Heavier loads in flywheel exercise induce greater post-activation performance enhancement in countermovement jumps compared to heavy Smith machine squats in males
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 exper...
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| Format: | Article |
| Language: | English |
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Termedia Publishing House
2024-04-01
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| Series: | Biology of Sport |
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| Online Access: | 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 |
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| author | Jianhua Shi Bing Yan Mengjie Yu Zhe Wang Yang Wang Haoyang Liu Wei Zhang Olivier Girard |
| author_facet | Jianhua Shi Bing Yan Mengjie Yu Zhe Wang Yang Wang Haoyang Liu Wei Zhang Olivier Girard |
| author_sort | Jianhua Shi |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-168fd9acf39547b28768e9de0a1779a8 |
| institution | Kabale University |
| issn | 0860-021X 2083-1862 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | Termedia Publishing House |
| record_format | Article |
| series | Biology of Sport |
| spelling | doaj-art-168fd9acf39547b28768e9de0a1779a82025-01-27T11:04:09ZengTermedia Publishing HouseBiology of Sport0860-021X2083-18622024-04-0141423124010.5114/biolsport.2024.13907554006Heavier loads in flywheel exercise induce greater post-activation performance enhancement in countermovement jumps compared to heavy Smith machine squats in malesJianhua ShiBing YanMengjie YuZhe WangYang WangHaoyang LiuWei ZhangOlivier GirardWe 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.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.htmlflywheel post-activation performance enhancement resistance exercise conditioning activities vertical jump ability back squats |
| spellingShingle | Jianhua Shi Bing Yan Mengjie Yu Zhe Wang Yang Wang Haoyang Liu Wei Zhang Olivier Girard Heavier loads in flywheel exercise induce greater post-activation performance enhancement in countermovement jumps compared to heavy Smith machine squats in males Biology of Sport flywheel post-activation performance enhancement resistance exercise conditioning activities vertical jump ability back squats |
| title | Heavier loads in flywheel exercise induce greater post-activation
performance enhancement in countermovement jumps compared
to heavy Smith machine squats in males |
| title_full | Heavier loads in flywheel exercise induce greater post-activation
performance enhancement in countermovement jumps compared
to heavy Smith machine squats in males |
| title_fullStr | Heavier loads in flywheel exercise induce greater post-activation
performance enhancement in countermovement jumps compared
to heavy Smith machine squats in males |
| title_full_unstemmed | Heavier loads in flywheel exercise induce greater post-activation
performance enhancement in countermovement jumps compared
to heavy Smith machine squats in males |
| title_short | Heavier loads in flywheel exercise induce greater post-activation
performance enhancement in countermovement jumps compared
to heavy Smith machine squats in males |
| title_sort | heavier loads in flywheel exercise induce greater post activation performance enhancement in countermovement jumps compared to heavy smith machine squats in males |
| topic | flywheel post-activation performance enhancement resistance exercise conditioning activities vertical jump ability back squats |
| url | 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 |
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