The Acute Effect of Proprioceptive Neuromuscular Facilitation in Explosive Force and Jump Resistance of Volleyball Players

Dao Chanh Thuc*

Received: October 24, 2018;   Published: October 30, 2018

DOI: 10.32474/OSMOAJ.2018.02.000132

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Abstract

Stretching during warm-up has been widely discussed for exerting a possible influence on performance. Thus, the purpose of this study was to verify the influence of the Proprioceptive Neuromuscular Facilitation (PNF) in the explosive force (EF) and the jump resistance (JR) of athletes. Twelve male volleyball players (21 ± 4 years; 178 ± 0cm; 75.82 ± 11.02kg; 23 ± 2.87kg/m2) underwent two PNF protocols: a) Protocol 1: four repetitions with 5- second maximum voluntary isometric contraction followed by 30 seconds of passive stretching and b) Protocol 2: four repetitions with 5-second maximum voluntary isometric contraction followed by 60 seconds of passive stretching. For the assessment of EF and JR the height of the countermovement vertical jump was considered measured through the Jump System Pro. The Student t test was used to compare the heights of the jumps between pre and post stretching moments for the two analyzed variables. EF (Protocols 1 and 2 t (7) = 1.462, p = 0.261, and t (7) = 1.402, p = 0.302, respectively) and JR (Protocols 1 and 2, t (7) = 1.542, p = 0.242, and t (7) = 0542, p = 0.712, respectively) did not differ significantly (p>0.05) after both stretching protocols. The results of this study show that the stretching protocols used did not acutely affect the performance of EF and JR of volleyball athletes.

Keywords: Stretching; Performance; Athletes; Sport; Volleyball

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