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Official Journal of the Italian Sports Medicine Federation
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 0,163
Online ISSN 1827-1863
Costa E. Silva G. 1, 2, Silveira A. 2, Novaes J. 1, Di Masi F. 2, 3, Conceição M. 3, Dantas E. 3
1 Physical Education Post Graduation Program, Rio de Janeiro Federal University, Rio de Janeiro, Brazil;
2 Laboratory of Physiology and Human Performance, Federal Rural University of Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil;
3 Laboratory of Human Motricity Biosciences, Rio de Janeiro State University, Rio de Janeiro, Brazil
AIM: This study verified the acute effect of static stretching (SS) and proprioceptive neuromuscular facilitation (PNF) stretching on front crawl swimming performance.
METHODS: Thirteen young males (22.7±1.42 years; 77.2±7.25 kg; 172.5±1.33 cm; BMI, 25.9±4.09) were submitted to three randomly select experimental protocols as follows: a) 50 m front crawl swimming maximal sprint test without any stretching training (CTRL); b) 50 m front crawl swimming maximal sprint test preceded by SS (2 sets of 30 s) for pectoral and quadriceps muscles (SS); and c) 50 m front crawl swimming maximal sprint test preceded by PNF (2 sets of 30 s using the Scientific Stretching for Sports [3S] method) for pectoral and quadriceps muscles (FNP). A one-way ANOVA with repeated measures was performed to identify differences between groups.
RESULTS: When the effects of control versus the stretching protocols were compared, a significant decrease was observed in the 50 m sprint test times: CTRL: 32.12±2.92 s vs. SS: 32.92±2.51 s, P<0.05; and CTRL: 32.12±2.92 s vs. PNF: 33.52±3.07 s, P<0.0001. We did not find any difference in performance when we compared the stretching protocols (P>0.05). This study is the first to demonstrate a loss in swimming performance following muscle stretching exercises. Our results demonstrated that SS and PNF caused statistically significant deleterious effects on swimming performance as evaluated by time taken to complete a 50 m front crawl swimming test. Moreover, SS did not generate a significantly different response compared to PNF.
CONCLUSION: This study shows that acute SS and PNF cause deficits in front crawl performance.
language: English, Italian