Chain-loaded variable resistance warm-up improves free-weight maximal back squat performance.
Identifieur interne : 002250 ( Main/Exploration ); précédent : 002249; suivant : 002251Chain-loaded variable resistance warm-up improves free-weight maximal back squat performance.
Auteurs : Minas A. Mina [Royaume-Uni] ; Anthony J. Blazevich [Australie] ; Giannis Giakas [Grèce] ; Laurent B. Seitz [France] ; Anthony D. Kay [Royaume-Uni]Source :
- European journal of sport science [ 1536-7290 ] ; 2016.
Descripteurs français
- KwdFr :
- MESH :
- physiologie : Genou, Haltérophilie, Muscles squelettiques.
- Adulte, Humains, Jeune adulte, Mâle, Électromyographie, Études croisées.
English descriptors
- KwdEn :
- MESH :
- physiology : Knee, Muscle, Skeletal, Weight Lifting.
- Adult, Cross-Over Studies, Electromyography, Humans, Male, Young Adult.
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.
DOI: 10.1080/17461391.2016.1199740
PubMed: 27432113
Affiliations:
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Mina</name><affiliation wicri:level="1"><nlm:affiliation>a Sport, Outdoor and Exercise Science , University of Derby , Buxton , UK.</nlm:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>a Sport, Outdoor and Exercise Science , University of Derby , Buxton </wicri:regionArea><wicri:noRegion>Buxton </wicri:noRegion></affiliation></author><author><name sortKey="Blazevich, Anthony J" sort="Blazevich, Anthony J" uniqKey="Blazevich A" first="Anthony J" last="Blazevich">Anthony J. Blazevich</name><affiliation wicri:level="2"><nlm:affiliation>b Centre for Exercise and Sports Science Research, School of Medical and Health Sciences , Edith Cowan University , Joondalup , Western Australia.</nlm:affiliation><country>Australie</country><placeName><region type="state">Australie-Occidentale</region></placeName><wicri:cityArea>b Centre for Exercise and Sports Science Research, School of Medical and Health Sciences , Edith Cowan University , Joondalup </wicri:cityArea></affiliation></author><author><name sortKey="Giakas, Giannis" sort="Giakas, Giannis" uniqKey="Giakas G" first="Giannis" last="Giakas">Giannis Giakas</name><affiliation wicri:level="1"><nlm:affiliation>c Department of PE & Sport Science , University of Thessaly , Trikala , Greece.</nlm:affiliation><country xml:lang="fr">Grèce</country><wicri:regionArea>c Department of PE & Sport Science , University of Thessaly , Trikala </wicri:regionArea><wicri:noRegion>Trikala </wicri:noRegion></affiliation></author><author><name sortKey="Seitz, Laurent B" sort="Seitz, Laurent B" uniqKey="Seitz L" first="Laurent B" last="Seitz">Laurent B. Seitz</name><affiliation wicri:level="1"><nlm:affiliation>d French Rugby League Academy , Toulouse , France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>d French Rugby League Academy , Toulouse </wicri:regionArea><wicri:noRegion>Toulouse </wicri:noRegion><wicri:noRegion>Toulouse </wicri:noRegion></affiliation></author><author><name sortKey="Kay, Anthony D" sort="Kay, Anthony D" uniqKey="Kay A" first="Anthony D" last="Kay">Anthony D. Kay</name><affiliation wicri:level="1"><nlm:affiliation>e Sport, Exercise & Life Sciences , University of Northampton , Northampton , UK.</nlm:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>e Sport, Exercise & Life Sciences , University of Northampton , Northampton </wicri:regionArea><wicri:noRegion>Northampton </wicri:noRegion></affiliation></author></analytic><series><title level="j">European journal of sport science</title><idno type="eISSN">1536-7290</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Cross-Over Studies</term><term>Electromyography</term><term>Humans</term><term>Knee (physiology)</term><term>Male</term><term>Muscle, Skeletal (physiology)</term><term>Weight Lifting (physiology)</term><term>Young Adult</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adulte</term><term>Genou (physiologie)</term><term>Haltérophilie (physiologie)</term><term>Humains</term><term>Jeune adulte</term><term>Muscles squelettiques (physiologie)</term><term>Mâle</term><term>Électromyographie</term><term>Études croisées</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Genou</term><term>Haltérophilie</term><term>Muscles squelettiques</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Knee</term><term>Muscle, Skeletal</term><term>Weight Lifting</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Cross-Over Studies</term><term>Electromyography</term><term>Humans</term><term>Male</term><term>Young Adult</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adulte</term><term>Humains</term><term>Jeune adulte</term><term>Mâle</term><term>Électromyographie</term><term>Études croisées</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">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.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li><li>Grèce</li><li>Royaume-Uni</li></country><region><li>Australie-Occidentale</li></region></list><tree><country name="Royaume-Uni"><noRegion><name sortKey="Mina, Minas A" sort="Mina, Minas A" uniqKey="Mina M" first="Minas A" last="Mina">Minas A. Mina</name></noRegion><name sortKey="Kay, Anthony D" sort="Kay, Anthony D" uniqKey="Kay A" first="Anthony D" last="Kay">Anthony D. Kay</name></country><country name="Australie"><region name="Australie-Occidentale"><name sortKey="Blazevich, Anthony J" sort="Blazevich, Anthony J" uniqKey="Blazevich A" first="Anthony J" last="Blazevich">Anthony J. Blazevich</name></region></country><country name="Grèce"><noRegion><name sortKey="Giakas, Giannis" sort="Giakas, Giannis" uniqKey="Giakas G" first="Giannis" last="Giakas">Giannis Giakas</name></noRegion></country><country name="France"><noRegion><name sortKey="Seitz, Laurent B" sort="Seitz, Laurent B" uniqKey="Seitz L" first="Laurent B" last="Seitz">Laurent B. Seitz</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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