Acute effects of stretching and/or warm-up on neuromuscular performance of volleyball athletes: a randomized cross-over clinical trial
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The purpose of this study was to analyze the acute effects of stretching and warm-up (isolated or combined) on electromyographic response and functional performance of college volleyball athletes. This is a randomized cross-over clinical trial composed of 11 male athletes (21.54 ± 2.42 years; 1.79 ± 0.09 m; 21.80 ± 1.50 kg/m2), members of the indoor volleyball team of the institution. All individuals underwent five randomly selected interventions, with a 7-day washout period: control, active warm-up, static stretching, warm-up followed by stretching, and stretching followed by warm-up. The athletes were assessed before and after interventions for the following variables: root mean square (RMS) signal during vertical jump through electromyographic activity of the rectus femoris and biceps femoris muscles and the vertical jump height; lower limb relative power; agility and velocity through functional tests. There were no significant changes on RMS values during vertical jump between the different interventions for the rectus femoris (P = 0.659) and the biceps femoris (P = 0.530) muscles, and functional tests (P ≥ 0.05). In conclusion, the effect of a single session of self-stretching and active warm-up (isolated or combined) does not interfere in the performance of volleyball college athletes.
KeywordsAssessment Athletic performance Muscle strength Electromyography
The authors acknowledge all participants of this study. This work was supported by the Coordination for the Improvement of Higher Education Personnel (CAPES).
Study conception and design: GMB; GAFD; SMP; WHBV. Acquisition of data: GMB; GAFD; SMP; JTPR; TLCO; KKFS. Analysis and interpretation of data: GMB; GAFD; SMP. Drafting of the manuscript: GMB; GAFD; WHBV. Critical revisions: all authors. Final approval of the article: all authors. GMB takes responsibility for the integrity of the work as a whole (email@example.com).
This work was financially supported by the Coordination for the Improvement of Higher Education Personnel (CAPES 2014–2016).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflicts of interest.
All procedures involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
Informed consent was obtained from all individual participants included in the study. Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.
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