Effects of Preload 4 Repetition Maximum on 100-m Sprint Times in Collegiate Women
- Autores: Elizabeth E. Linder, Jan H. Prins, Nathan M. Murata, Coop DeRenne, Charles F. Morgan, John Solomon
- Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 24, Nº. 5, 2010, págs. 1184-1190
- Idioma: inglés
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- Dialnet Métricas: 3 Citas
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Resumen
The purpose of this study was to determine the effects of postactivation potentiation (PAP) on track-sprint performance after a preload set of 4 repetition maximum (4RM) parallel back half-squat exercises in collegiate women. All subjects (n = 12) participated in 2 testing sessions over a 3-week period. During the first testing session, subjects performed the Controlled protocol consisting of a 4-minute standardized warm-up, followed by a 4-minute active rest, a 100-m track sprint, a second 4-minute active rest, finalized with a second 100-m sprint. The second testing session, the Treatment protocol, consisted of a 4-minute standardized warm-up, followed by 4-minute active rest, sprint, a second 4-minute active rest, a warm-up of 4RM parallel back half-squat, a third 9-minute active rest, finalized with a second sprint. The results indicated that there was a significant improvement of 0.19 seconds (p < 0.05), when the second sprint was preceded by a 4RM back-squat protocol during Treatment. The standardized effect size, d, was 0.82, indicating a large effect size. Additionally, the results indicated that it would be expected that mean sprint times would increase 0.04-0.34 seconds (p < 0.05), when using a preload 4RM squat protocol. There were no significant differences between Control pre and posttests (p > 0.05). The findings suggest that performing a 4RM parallel back half-squat warm-up before a track sprint will have a positive PAP affect on decreased track-sprint times. Track coaches, looking for the �competitive edge� (PAP effect) may re-warm up their sprinters during meets.
