Comparison of time under tension, repetition maximum and electromyographic activity in bench press exercise in different speeds execution

Abstract

Salarolli LCW, Barros RMB, Silva JB, Carvalho ILS, Vale RGS, Nunes RAM, Castro JBP, Lima VP. Comparison of time under tension, repetition maximum and electromyographic activity in bench press exercise in different speeds execution. Gazzetta Medica Italiana Archivio per le Scienze Mediche. 2018; 177(11): 637-644. [In Press].

BACKGROUND: The aim of this study is to compare the time under tension (TUT), repetition maximum and electromyographic activity (EMG) during the execution of bench press exercise in the Smith machine with maximum execution speed and controlled cadence. METHODS: The study included ten men trained in resistance exercise (age: 23.5 ± 2.96 years; stature: 179.3 ± 6.28 cm; body mass: 84.71 ± 8.15 kg). The experimental procedure performed by the individuals happened in two non-consecutive days. They performed the 1RM test and, subsequently, they performed the bench press exercise in the Smith machine at 80% of 1RM at maximum speed. After 48 hours, they performed the exercise proposed with controlled cadence (2x2). A metronome controlled the rhythmic speed. The pace moving was set up in 2 seconds for each phase (concentric and eccentric). RESULTS: The t-test for paired samples showed a significant difference for the number of repetition maximum between protocols. However, there was no significant difference in pectoral, deltoid and triceps activation by comparing the two speeds. In addition, no significant difference was found in TUT when comparing both protocols. CONCLUSIONS: It can be concluded that a higher number of repetitions performed during the maximum speed protocol did not interfere in the muscle activation pattern when the TUT were similar. This way, performing the paced protocol may be an efficient strategy for conducting training with fewer repetitions.

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ORIGINAL ARTICLE
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  

t





Cite this article as:      
et al. 


Key words: 





PROOF
MINERVA MEDICA
PROFF ID.indd 1 10/09/10 14:28

 
  

       
      

Materials and methods
Sample

     
      

      
      





       
      


    

    


     

Procedures
One-repetitiOn maximum (1rm) lOad de-
terminatiOn
      
    

       




     
    
      



     
     






     
     
      
 





   
 
      

 
      

      




     
       
    
  





 
  
       
       



      
       
PROOF
MINERVA MEDICA
PROFF ID.indd 1 10/09/10 14:28

 
  
       
       
     


      

    

     
      
     


       
       
    

     
  

    

  
et al.


 
 

  

      
    
    

experimental prOtOcOl
    



     
      

  
   
     
     
      






  



 


      


 



executiOn pattern Of the bench press ex-
ercise




      


       
       




   




electrOmyOgraphic activity
     
   
PROOF
MINERVA MEDICA
PROFF ID.indd 1 10/09/10 14:28

 
  
   t   


Results
    

     
     
    
        

      
      
    

 
      
     


Discussion
 




 
   

      

 
     






        
       



       
  
     
 

Statistical analysis



      


table i.Time under tension (TUT) and repetition maximum (RM) between the protocols of maximum
speed (MS) and cadenced speed (Cad).
 
   
    
    


table ii.Percentage values of normalized root mean square (RMS) at maximum speed (MS) and cadenced speed
(Cad).
   
        
        


PROOF
MINERVA MEDICA
PROFF ID.indd 1 10/09/10 14:28

 
  
 
     
     



 et al.     
     
     

    


      
        
   
    
         
       
      
     
 



    

    





 




        


      


    



   


et al.
   et al.
et al.
    et al. 

      
 
    
    
    
     
 



     



      

      
      

       
 et al.      
     
      
       
      




  
 


et al.

   



   

        
PROOF
MINERVA MEDICA
PROFF ID.indd 1 10/09/10 14:28

 
  






     

     
       






    

    
      

      
     
 
      




      
      
       





   
      
 
     

et al.

    


 



 et al.    
   








     

 
     





     
       

      

 et al.    
     
     
  
  
     
       


      
       


  

      


 
      

  
 
PROOF
MINERVA MEDICA
PROFF ID.indd 1 10/09/10 14:28

 
  

      
    

References
         

   

        
       

        

        



         
   
       
       
      

        
et al.
 
         

        
     et al. 
      
       
       
       

         

       


         

  

  
       
   
 

        
   



       
  
        
        

  
    


  

 


 


     
     
  


Limitations of the study
  
      
      
      
      


Conclusions

       
      
      

  
 


       
  


      




   





PROOF
MINERVA MEDICA
PROFF ID.indd 1 10/09/10 14:28

 
  
 
       

   

     

        


        
 

        
  
     

   
et al.
     

   

 
       

   
      

 
 

    
      

 

   


     





      


        
 



  

   


   




        
     

      
       

    
   et al.   
 
 
   

         
       


 
     
  


 
   

Conicts of interest.— 


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PROFF ID.indd 1 10/09/10 14:28