The back squat and the power clean: elicitation of different degrees of potentiation.
| Autor: | Seitz LB; Center for Exercise and Sport Science Research, Edith Cowan University, Joondalup, WA, Australia., Trajano GS, Haff GG |
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| Jazyk: | angličtina |
| Zdroj: | International journal of sports physiology and performance [Int J Sports Physiol Perform] 2014 Jul; Vol. 9 (4), pp. 643-9. Date of Electronic Publication: 2013 Oct 23. |
| DOI: | 10.1123/ijspp.2013-0358 |
| Abstrakt: | Purpose: To compare the acute effects of back squats and power cleans on sprint performance. Methods: Thirteen elite junior rugby league players performed 20-m linear sprints before and 7 min after 2 different conditioning activities or 1 control condition. The conditioning activities included 1 set of 3 back squats or power cleans at 90% 1-repetition maximum. A 2 × 2 repeated-measures ANOVA was used to compare preconditioning and postconditioning changes in sprint performance. Results: Both the back-squat and power-clean conditioning activities demonstrated a potentiation effect as indicated by improved sprint time (back squat: P = .001, ES = -0.66; power cleans: P = .001, ES = -0.92), velocity (back squat: P = .001, ES = 0.63; power cleans: P = .001, ES = 0.84), and average acceleration over 20 m (back squat: P = .001, ES = 0.70; power cleans: P = .001, ES = 1.00). No potentiation effect was observed after the control condition. Overall, the power clean induced a greater improvement in sprint time (P = .042, ES = 0.83), velocity (P = .047, ES = 1.17), and average acceleration (P = .05, ES = 0.87) than the back squat. Conclusions: Back-squat and power-clean conditioning activities both induced improvements in sprint performance when included as part of a potentiation protocol. However, the magnitude of improvement was greater after the power cleans. From a practical perspective, strength and conditioning coaches should consider using power cleans rather than back squats to maximize the performance effects of potentiation complexes targeting the development of sprint performance. |
| Databáze: | MEDLINE |
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