Chain-loaded variable resistance warm-up improves free-weight maximal back squat performance.
Journal article
Authors | Mina, M., Blazevich, Anthony J., Giakas, Giannis, Seitz, Laurent B. and Kay, Anthony D. |
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Abstract | The acute influence of chain-loaded variable resistance exercise on subsequent free-weight one-repetition maximum (1-RM) back squat performance was examined in 16 recreationally active men. The participants performed either a free-weight resistance (FWR) or chain-loaded resistance (CLR) back squat warm-up at 85% 1-RM on two separate occasions. After a 5-min rest, the participants attempted a free-weight 1-RM back squat; if successful, subsequent 5% load additions were made until participants failed to complete the lift. During the 1-RM trials, 3D knee joint kinematics and knee extensor and flexor electromyograms (EMG) were recorded simultaneously. Significantly greater 1-RM (6.2 ± 5.0%; p < .01) and mean eccentric knee extensor EMG (32.2 ± 6.7%; p < .01) were found after the CLR warm-up compared to the FWR condition. However, no difference (p > .05) was found in concentric EMG, eccentric or concentric knee angular velocity, or peak knee flexion angle. Performing a CLR warm-up enhanced subsequent free-weight 1-RM performance without changes in knee flexion angle or eccentric and concentric knee angular velocities; thus a real 1-RM increase was achieved as the mechanics of the lift were not altered. These results are indicative of a potentiating effect of CLR in a warm-up, which may benefit athletes in tasks where high-level strength is required. |
Keywords | Post-activation potentiation (PAP); Accomodating resistance; Sport science; Preconditioning; Strength training |
Year | 2016 |
Journal | European Journal of Sport Science |
Journal citation | 16 (8), pp. 932-939 |
Publisher | Taylor & Francis |
ISSN | 17461391 |
15367290 | |
Digital Object Identifier (DOI) | https://doi.org/10.1080/17461391.2016.1199740 |
Web address (URL) | https://pure.northampton.ac.uk/en/publications/chain-loaded-variable-resistance-warm-up-improves-free-weight-max |
https://www.tandfonline.com/doi/full/10.1080/17461391.2016.1199740 | |
hdl:10545/621966 | |
Output status | Published |
Publication dates | 18 Jul 2016 |
Publication process dates | |
Deposited | 24 Nov 2017, 13:01 |
Rights | Archived with thanks to European Journal of Sport Science |
Contributors | University of Derby, Edith Cowan University, University of Thessaly, French Rugby League Academy and University of Northampton |
File | File Access Level Restricted |
https://repository.derby.ac.uk/item/94347/chain-loaded-variable-resistance-warm-up-improves-free-weight-maximal-back-squat-performance
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