Day Deans Buchan’s research while affiliated with Canadian Memorial Chiropractic College and other places

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Publications (1)


Variations in muscle activation levels during traditional latissimus dorsi weight training exercises: An experimental study
  • Article
  • Full-text available

June 2004

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4,177 Reads

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67 Citations

Dynamic Medicine

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Day Deans Buchan

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Angela Lundy

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[...]

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Andrea Nalborczyk

Background Exercise beliefs abound regarding variations in strength training techniques on muscle activation levels yet little research has validated these ideas. The purpose of the study is to determine muscle activation level, expressed as a percent of a normalization contraction, of the latissimus dorsi, biceps brachii and middle trapezius/rhomboids muscle groups during a series of different exercise tasks. Methods The average muscle activity during four tasks; wide grip pulldown, reverse grip pull down [RGP], seated row with retracted scapula, and seated rows with non-retracted scapulae was quantified during two 10 second isometric portions of the four exercises. A repeated measures ANOVA with post-hoc Tukey test was used to determine the influence of exercise type on muscle activity for each muscle. Results & Discussion No exercise type influenced biceps brachii activity. The highest latissimus dorsi to biceps ratio of activation occurred during the wide grip pulldown and the seated row. Highest levels of myoelectric activity in the middle trapezius/rhomboid muscle group occurred during the seated row. Actively retracting the scapula did not influence middle trapezius/rhomboid activity. Conclusion Variations in latissimus dorsi exercises are capable of producing small changes in the myoelectric activity of the primary movers.

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Citations (1)


... On the other hand, the effects of grip width on muscle strength in upright rowing were analyzed as different positions may lead to varying involvement of muscle groups, concluding that the activation using the optimal width and grip for latissimus dorsi is a prone grip and using a narrow or medium width, as they presented a greater application of force (Andersen, et al., 2014). In another exercise such as pull-ups, no significant differences were found in grip difference between pronated and neutral (Lehman et al., 2004). The muscular activation of the latissimus dorsi between the pull-down and pull-up exercises did not show any significant differences (Doma, et al., 2013). ...

Reference:

Comparación de la actividad electromiográfica de los músculos implicados en el remo horizontal de polea baja con diferentes agarres y anchuras bilaterales (Comparison of the electromyographic activity of the muscles involved in low pulley horizontal rowing with different grips and bilateral widths)
Variations in muscle activation levels during traditional latissimus dorsi weight training exercises: An experimental study

Dynamic Medicine