Effects of Preload 4 Repetition Maximum on 100-m Sprint Times in Collegiate Women
| Autor: | Jan H. Prins, Charles F. Morgan, John Solomon, Nathan M. Murata, Coop DeRenne, Elizabeth E Linder |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Adult
Rest (physics) medicine.medical_specialty Treatment protocol business.industry musculoskeletal neural and ocular physiology Track and Field Repetition maximum Physical Therapy Sports Therapy and Rehabilitation General Medicine Athletic Performance Running Preload Sprint Post activation potentiation Physical therapy Humans Medicine Female Orthopedics and Sports Medicine business Exercise human activities Muscle Contraction |
| Zdroj: | Journal of Strength and Conditioning Research. 24:1184-1190 |
| ISSN: | 1064-8011 |
| DOI: | 10.1519/jsc.0b013e3181d75806 |
| Popis: | 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 (p0.05), 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 (p0.05), when using a preload 4RM squat protocol. There were no significant differences between Control pre and posttests (p0.05). 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. |
| Databáze: | OpenAIRE |
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