Academic Journal
Heavier loads in flywheel exercise induce greater post-activation performance enhancement in countermovement jumps compared to heavy Smith machine squats in males
| العنوان: | Heavier loads in flywheel exercise induce greater post-activation performance enhancement in countermovement jumps compared to heavy Smith machine squats in males |
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| المؤلفون: | Jianhua Shi, Bing Yan, Mengjie Yu, Zhe Wang, Yang Wang, Haoyang Liu, Wei Zhang, Olivier Girard |
| المصدر: | Biology of Sport, Vol 41, Iss 4, Pp 231-240 (2024) |
| بيانات النشر: | Termedia Publishing House, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Sports medicine LCC:Biology (General) |
| مصطلحات موضوعية: | flywheel, post-activation performance enhancement, resistance exercise, conditioning activities, vertical jump ability, back squats, Sports medicine, RC1200-1245, Biology (General), QH301-705.5 |
| الوصف: | We evaluated the effects of post-activation performance enhancement through flywheel exercise with varying inertial loads compared to traditional resistance exercise on countermovement jump performance and muscle recruitment. In a randomized crossover design, 13 trained men completed four main experimental trials after three familiarization sessions. These conditions included a traditional trial consisting of 5 sets of 1 repetition using the Smith machine (SM) squat at 90% 1RM, and three flywheel ergometer trials. Each flywheel protocol consisted of 3 sets of 8 repetitions with 3-minute rest intervals between sets, utilizing one of three inertial loads (0.0465, 0.0784, and 0.1568 kg · m 2 for light, moderate, and heavy, respectively). Participants performed countermovement jumps before (baseline), immediately after (0 minute), and at the fourth (+4 minutes), eighth (+8 minutes), and twelfth (+12 minutes) minute following exercise. Compared to baseline, jump height was higher at +4 minutes for SM squats ( p = 0.009). All flywheel conditions exhibited higher jump heights at +4 minutes ( p < 0.05), +8 minutes ( p < 0.001), and +12 minutes ( p < 0.001) compared to baseline. Additionally, moderate and heavy loads resulted in higher jump heights at 0 minute (both p < 0.001). Integrated electromyographic activity values, a proxy for muscle recruitment, were significantly higher for the gluteus maximus muscle at both +8 minutes and +12 minutes for moderate (both p = 0.004) and heavy loads ( p ≤ 0.002) compared to SM squats. Overall, flywheel protocols produce greater post-activation performance enhancement, extend the time window for improvement, and recruit more active musculature compared to heavy-load SM squats, particularly with heavier loads acting as a stronger preload stimulus. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0860-021X 2083-1862 |
| Relation: | https://www.termedia.pl/Heavier-loads-in-flywheel-exercise-induce-greater-post-activation-r-nperformance-enhancement-in-countermovement-jumps-compared-r-nto-heavy-Smith-machine-squats-in-males,78,54006,1,1.html; https://doaj.org/toc/0860-021X; https://doaj.org/toc/2083-1862 |
| DOI: | 10.5114/biolsport.2024.139075 |
| URL الوصول: | https://doaj.org/article/168fd9acf39547b28768e9de0a1779a8 |
| رقم الانضمام: | edsdoj.168fd9acf39547b28768e9de0a1779a8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 0860021X 20831862 |
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| DOI: | 10.5114/biolsport.2024.139075 |