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The influence of asymmetry on performance in sports with highly asymmetric demands is yet to be properly determined. This investigation sought to examine jump-based asymmetries within skateboarders and determine any possible relationships with subjective skating ranking and jumping performance. Twelve recreational skateboarders (age: 24 ± 7 years;...
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Context 1
... skateboarders performed a familiarisation trial and a single experimental trial following a standardised dynamic warm up (Table 1). Skaters performed three trials of three different unilateral jump tests (SJ, CMJ and DJ) designed to examine ballistic performance under three different conditions (concentric-only, stretch-shortening cycle and plyometric, respectively). ...Context 2
... to the familiarisation and experimental testing session, each participant completed a standardised dynamic warmup (Table 1). Following the warm-up, participants performed three unilateral jumping variations on both limbs: 1) squat jump (SJ), countermovement jump (CMJ) and drop jump (DJ). ...Citations
... Due to the nature of skateboarding, which includes high-speed and extreme maneuvers, injuries are common when skateboarders collide with inanimate objects, fall from skateboards, or are involved in vehicular traffic (Shuman & Meyers, 2015). Skateboarding too often without warming up and performing dangerous maneuvers or tricks and performing tricks incorrectly can cause knee pain for skateboarders (Maloney et al., 2021). ...
Background: Skateboarding is also an extreme sport and in Indonesia it is not very popular but has the potential to be liked by young people in Singaraja Bali. Due to the nature of skateboarding, including high speeds and extreme maneuvers, such as jumping from heights and performing extreme movements that can injure the joint bearing of the knee, injuries often occur when a skateboarder collides with an inanimate object, falling off the skateboard. Knee support is made of elastic material with medial and lateral supports made of metal. Elastic material that has the ability to stretch and return to its original state quickly so that it serves as a fixation on the knee that suffers from knee pain. With the fixation on the knee as well as support and stabilizer on the knee joint will relieve pain in patients with knee pain so it is expected to reduce pain. Method: The research design of the effect of the use of knee support to knee pain of skateboard players is a type of quantitative research using a quasi-experimental design with one group pre and posttest design. Data was collected in the Singaraja Bali sports hall in September - December 2020. Skateboarders' knee pain was measured using a VAS (Visual Analogue Scale) questionnaire. The population is 14 skateboarders who play at the Singaraja Bali sports hall. All respondents were sampled using the total sampling method. Result: There were 11 males and 3 females as respondents. Pre-test Knee pain VAS score before using knee support is average of 5.93 while the post test score after using knee support for two weeks is average of 2.14. Normality data using the Shapiro Wilk result is not normally distributed. The result of Wilcoxon is p value 0.001. P value is less than 0.05. So it can be concluded that the use of knee support has a significant effect in reducing knee pain in skateboarders. Conclusion: there is an effect of the use of knee support to knee pain of skateboard players. It is advisable for skateboarders to wear knee support when feeling pain while skateboarding.
... In this regard, the relationship between inter-limb asymmetry and performance measures is not yet conclusive [3], and thus warrants further investigation. Furthermore, studies have focused on unilateral jumping inter-limb asymmetries across different sports (e.g., soccer, skateboarders, cricket, basketball, badminton, tennis) and within a specific gender (i.e., either male or female) [17][18][19][20][21][22]. However, inter-limb jump asymmetry (i.e., using dry land tests such as CMJ and SLJ) among young male and female swimmers and their relationship with sport-specific performance has received little attention in the literature. ...
... Dos'Santos et al. [12] reported no association of single-leg hop and single-leg triple hop with the modified 505 agility test (r = 0.22 to −0.29), and 90 • cutting task (r = −0.08 to 0.35) among male collegiate team sport athletes (i.e., soccer, rugby, and cricket) aged 22 years. Loturco et al. [11] also found no association of inter-limb jump asymmetries (i.e., SL CMJ and single-leg squat jump) and performance measures (5,10,20, and 30 m linear sprint, zigzag CoD, and muscle power test using the jump squat) in elite female soccer players aged 23 years. Madruga-Parera et al. [8] also reported no association of SL CMJ and SL SLJ with 20 m, CoD with 180 • turns, and CoD with 45 • turns in male adolescent handball players aged 16 years. ...
This study aimed to examine inter-limb jump asymmetries and their association with sport-specific performance in young swimmers. Thirty-eight (male, n=19; female, n=19) region-al/national level young swimmers (age: 12.3±1.2 years; height: 159.6±8.2 cm; body mass: 52.5±9.2 kg) participated in this study. Inter-limb asymmetries were assessed for single-leg counter-movement jump (SLCMJ) and single-leg standing long jump (SLSLJ). Sport-specific performance was evaluated using front crawl (i.e., 50-m and 25-m) and front crawl kick (i.e., 50-m and 25-m). The Kappa coefficient revealed a ‘slight’ level of agreement (Κ=0.156, 0.184 and 0.197 for female, male and all, respectively) between the direction of asymmetry for SLCMJ and SLSLJ, indicating that asymmetries rarely favoured the same limb during both tests. A paired sample t-test showed a significant difference (p=0.025) between asymmetry scores obtained in SLCMJ and SLSLJ. No significant difference was found in asymmetry scores between males and females (p=0.099 to 0.977). Additionally, no association between asymmetry scores and sport-specific performance was observed (p>0.05). Our findings highlight the independent nature of inter-limb asymmetries derived from SLCMJ and SLSLJ among young male and female swimmers. Further, our results suggest no association between jumping asymmetries and sport-specific performance.
Background
The inclusion of skateboarding in the Olympics suggests that athletes and coaches are seeking ways to enhance their chances of succeeding on the world stage. Understanding what constitutes performance, and what physical, neuromuscular, and biomechanical capacities underlie it, is likely critical to success.
Objective
The aim was to overview the current literature and identify knowledge gaps related to competitive skateboarding performance and associated physical, technical, and tactical demands of Olympic skateboarding disciplines.
Methods
A systematic scoping review was performed considering the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (Extension for Scoping Reviews) guidelines. Data sources were MEDLINE (Ovid), Scopus, SPORTDiscus, and PubMed. We included all peer-reviewed literature after 1970 describing the physiological, neuromuscular, biomechanical, and/or tactical aspects of skateboarding.
Results
Nineteen original articles explored the physiological (n = 9), biomechanical (n = 8), and technical (n = 10) demands of skateboarding. No research explored the tactical demands of competition. Moreover, although competitive males (n = 2 studies) and females (n = 1 study) were recruited as participants, no research directly related skateboarding demands to performance success in competitive environments.
Conclusions
Ultimately, what constitutes and distinguishes competitive skateboarding is unexplored. There is some evidence indicating aspects of the sport require flexibility and elevated and fast force output of the lower limbs, which may be valuable when attempting to maximise ollie height. Nonetheless, a lack of ecological validity, such as using static ollie tests as opposed to rolling, restricted our ability to provide practical recommendations, and inconsistency of terminology complicated delineating discipline-specific outcomes. Future researchers should first look to objectively identify what skaters do in competition before assessing what qualities enable their performance.
