Chain-loaded variable resistance warm-up improves free-weight maximal back squat performance.

Hdl Handle:
http://hdl.handle.net/10545/621966
Title:
Chain-loaded variable resistance warm-up improves free-weight maximal back squat performance.
Authors:
Mina, Minas A. ( 0000-0001-9537-5953 ) ; Blazevich, Anthony J.; Giakas, Giannis; Seitz, Laurent B.; Kay, Anthony D.
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.
Affiliation:
University of Derby; Edith Cowan University; University of Thessaly; French Rugby League Academy; University of Northampton
Citation:
Mina, M. A. et al (2016) 'Chain-loaded variable resistance warm-up improves free-weight maximal back squat performance', European Journal of Sport Science, 16 (8):932
Publisher:
Taylor and Francis
Journal:
European Journal of Sport Science
Issue Date:
18-Jul-2016
URI:
http://hdl.handle.net/10545/621966
DOI:
10.1080/17461391.2016.1199740
Additional Links:
https://www.tandfonline.com/doi/full/10.1080/17461391.2016.1199740
Type:
Article
Language:
en
ISSN:
17461391
EISSN:
15367290
Sponsors:
n/a
Appears in Collections:
School of Human Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorMina, Minas A.en
dc.contributor.authorBlazevich, Anthony J.en
dc.contributor.authorGiakas, Giannisen
dc.contributor.authorSeitz, Laurent B.en
dc.contributor.authorKay, Anthony D.en
dc.date.accessioned2017-11-24T13:01:03Z-
dc.date.available2017-11-24T13:01:03Z-
dc.date.issued2016-07-18-
dc.identifier.citationMina, M. A. et al (2016) 'Chain-loaded variable resistance warm-up improves free-weight maximal back squat performance', European Journal of Sport Science, 16 (8):932en
dc.identifier.issn17461391-
dc.identifier.doi10.1080/17461391.2016.1199740-
dc.identifier.urihttp://hdl.handle.net/10545/621966-
dc.description.abstractThe 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.en
dc.description.sponsorshipn/aen
dc.language.isoenen
dc.publisherTaylor and Francisen
dc.relation.urlhttps://www.tandfonline.com/doi/full/10.1080/17461391.2016.1199740en
dc.rightsArchived with thanks to European Journal of Sport Scienceen
dc.subjectPost-activation potentiation (PAP)en
dc.subjectAccomodating resistanceen
dc.subjectSport scienceen
dc.subjectPreconditioningen
dc.subjectStrength trainingen
dc.titleChain-loaded variable resistance warm-up improves free-weight maximal back squat performance.en
dc.typeArticleen
dc.identifier.eissn15367290-
dc.contributor.departmentUniversity of Derbyen
dc.contributor.departmentEdith Cowan Universityen
dc.contributor.departmentUniversity of Thessalyen
dc.contributor.departmentFrench Rugby League Academyen
dc.contributor.departmentUniversity of Northamptonen
dc.identifier.journalEuropean Journal of Sport Scienceen
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