Journal
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
Volume 22, Issue 3, Pages 794-800Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1519/JSC.0b013e31816a4353
Keywords
passive stretching; lower limb muscle; vertical jump; squat jump; maximal anaerobic power
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The purpose of the study was to provide practical suggestions on the effect of stretching on the maximal anaerobic power preceded by active or passive warm-up. To this aim, 15 relatively fit male subjects (age 23 +/- 60.2 years, height 177 +/- 2 cm, body mass 74 +/- 2 kg; [mean 6 SE]) randomly performed a series of squat jumps (SJ) and countermovement jumps (CMJ). Jumps were preceded alternatively by: i) passive stretching of lower limbs muscles; ii) active warm-up (AWU); iii) passive warm up (PWU); and iv) the joining of stretching with either active warm-up (AWU+S) or passive warm-up (PWU+S). In control conditions (C) only jumps were required. For the 2 jumps the flight time (Ft), the peak force (Pf), and the maximal power ((W) over dotmax) were calculated. It resulted that Ft, Pf, and (W) over dotmax values were significantly higher: i) after AWU than after PWU and PWU+S in CMJ; and ii) in AWU as compared to those of other protocols of SJ. Stretching did not negatively affect the maximal anaerobic power, per se, but seems to inhibit the effect of AWU. The results suggested that AWU seemed to increase vertical jump performance when compared to PWU, presumably due to an increase in metabolic activity as a consequence of AWU, which did not occur in PWU, despite the same skin temperature. Passive stretching alone seemed not to negatively influence vertical jump performance, whereas, if added after AWU, could reduce the power output.
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