Abstract：
OBJECTIVES:To determine the residual acute vibration-stretching effect on preactivation levels, short-latency stretch reflex, and performance during execution of drop jumps. DESIGN:Repeated measures. METHODS:Eleven male recreational athletes performed a set of three 45cm drop jumps before and immediately after a 30s static stretching exercise with and without simultaneously imposed muscle vibration (45Hz, 5mm). Drop jump height, ground reaction forces and electromyographic data including Vastus Lateralis onset/levels of preactivation and short-latency stretch reflex were recorded. RESULTS:No changes were induced on drop jump height. However, stretching-induced decrements on ground reaction force peak and time to peak as well as an increment in contact time followed a delay in short-latency stretch reflex onset and a reduced preactivation level of Vastus Lateralis. Otherwise, when vibration was simultaneously imposed, there was no evidence of changes in high-speed force production variables or electromyographic recordings. CONCLUSIONS:Mechanical vibration, when applied simultaneously to static-stretching routines, appeared to be effective to counteract decreased musculotendinous unit stiffness-induced high-speed force production deficit during jumping performance.
journal_name
J Sci Med Sportjournal_title
Journal of science and medicine in sportauthors
Fernandes IA,Kawchuk G,Bhambhani Y,Gomes PSdoi
10.1016/j.jsams.2012.11.886subject
Has Abstractpub_date
2013-09-01 00:00:00pages
472-6issue
5eissn
1440-2440issn
1878-1861pii
S1440-2440(12)01097-3journal_volume
16pub_type
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