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Hindi Research Article, J Athl Enhancement Vol: 4 Issue: 6
Peak Ankle Muscle Activity of Faster and Slower Basketball Players during the Change-of-Direction Step in a Reactive Cutting Task
| Robert G Lockie1*, Adrian B Schultz2, Tye S McGann2, Farzad Jalilvand1, Samuel J Callaghan3 and Matthew D Jeffriess4 | |
| 1Department of Kinesiology, California State University, Northridge, Northridge, USA | |
| 2Exercise and Sport Science Department, School of Environmental and Life Sciences, University of Newcastle, Ourimbah, Australia | |
| 3School of Exercise and Health Sciences, Edith Cowan University, Joondalup, Australia | |
| 4Faculty of Health, University of Technology, Sydney, Lindfield, Australia | |
| Corresponding author : Robert Lockie Department of Kinesiology, California State University, Northridge, Northridge, USA Tel: +1 818-677-6983 Fax: +1 818-677-3207 E-mail: robert.lockie@csun.edu |
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| Received: July 17, 2015 Accepted: December 14, 2015 Published: December 20, 2015 | |
| Citation: Lockie RG, Schultz AB, McGann TS, Jalilvand F, Callaghan SJ, et al. (2015) Peak Ankle Muscle Activity of Faster and Slower Basketball Players during the Change-of-Direction Step in a Reactive Cutting Task. J Athl Enhancement 4:6. doi:10.4172/2324-9080.1000216 |
Abstract
Peak Ankle Muscle Activity of Faster and Slower Basketball Players during the Change-of-Direction Step in a Reactive Cutting Task
Study Background: Basketball requires frequent direction changes during match-play under reactive conditions. The ankle dynamic stabilizer muscles (Tibialis Anterior [TA], Peroneus Longus [PL], Peroneus Brevis [PB], soleus) may influence cutting effectiveness. This study examined whether ankle muscle activity differentiated between faster and slower basketballers in a reactive cutting task. Methods: Eighteen male basketballers completed six reactive trials (randomized three left and three right) of the Y-shaped agility test. Electromyography measured peak normalized (against 10-meter sprint muscle activity) activity (nEMG) of the TA, PL, PB, and soleus for both the inside and outside legs during the change-ofdirection step (first step past the trigger gate that initiated the cut). The outside leg was the leg furthest from the target gate; the inside leg was the closest. The faster direction change (left or right) was defined as the preferred or non-preferred cut direction. Preferred cut direction time was used to divide the sample into faster (n=9) and slower (n=9) groups. A one-way analysis of variance (p<0.003 for multiple comparisons) and effect sizes calculated any betweengroup differences in cutting and muscle activity. Data was pooled for a correlation analysis (p<0.05) between test times and ankle muscle nEMG. Results: The faster group was quicker in the preferred and nonpreferred cuts, although there were no significant between-group differences in muscle activity, and no significant correlations. There was a large effect for the 83% greater inside leg PL nEMG for the faster group in the preferred cut compared to the slower group, although this was non-significant. Conclusion: The greater activity of the inside leg PL for the faster group, shown by the large effect, could have aided foot movement during the change-of-direction step. Nevertheless, ankle muscle activity generally did not distinguish between faster and slower reactive cuts in basketballers.
