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The temporal profile of postactivation potentiation is related to strength level.

Identifieur interne : 003784 ( PubMed/Curation ); précédent : 003783; suivant : 003785

The temporal profile of postactivation potentiation is related to strength level.

Auteurs : Laurent B. Seitz [Espagne] ; Eduardo S. De Villarreal ; G Gregory Haff

Source :

Journal of strength and conditioning research [ 1533-4287 ] ; 2014.

RBID : pubmed:23965945

Descripteurs français

KwdFr :
- Adolescent, Contraction musculaire (physiologie), Facteurs temps, Football américain, Force musculaire (physiologie), Humains, Jeune adulte, Mouvement (physiologie), Muscles squelettiques (physiologie), Repos (physiologie), Épreuve d'effort.
MESH :
- physiologie : Contraction musculaire, Force musculaire, Mouvement, Muscles squelettiques, Repos.
- Adolescent, Facteurs temps, Football américain, Humains, Jeune adulte, Épreuve d'effort.

English descriptors

KwdEn :
- Adolescent, Exercise Test, Football, Humans, Movement (physiology), Muscle Contraction (physiology), Muscle Strength (physiology), Muscle, Skeletal (physiology), Rest (physiology), Time Factors, Young Adult.
MESH :
- physiology : Movement, Muscle Contraction, Muscle Strength, Muscle, Skeletal, Rest.
- Adolescent, Exercise Test, Football, Humans, Time Factors, Young Adult.

Abstract

The purpose of this investigation was to determine whether stronger individuals are able to express postactivation potentiation (PAP) earlier than weaker individuals during a vertical squat jump test. Eighteen junior elite rugby league players were divided into strong (relative 1 repetition maximum [1RM] back squat ≥ 2 × body mass) and weak (relative 1RM back squat <2.0 × body mass) groups. Each subject performed squat jumps before, 15 seconds, 3, 6, 9, and 12 minutes after a conditioning activity (CA) that contained 1 set of 3 back squats performed at 90% of 1RM. A force plate, which sampled at 1000 Hz, was used to determine the power output and height for each squat jump. Stronger individuals expressed PAP between 3 and 12 minutes post-CA, whereas their weaker counterparts displayed potentiation between 6 and 12 minutes post-CA. Moreover, the stronger group exhibited a significantly (p ≤ 0.05) higher PAP response than the weaker group at all post-CA squat jump tests. The stronger group displayed the greatest potentiation at 6 minutes post-CA, whereas the weaker group displayed the greatest potentiation response at 9 minutes following the CA. Based on these results, stronger individuals appear to be able to express PAP earlier after a CA than weaker individuals. Additionally, stronger individuals express significantly greater postactivation responses than weaker individuals. From a practical standpoint, strength and conditioning coaches should consider the athletes' strength levels when constructing postactivation complexes (CA + performance activity) as strength will dictate the time frame required between the conditioning and the performance activity.

DOI: 10.1519/JSC.0b013e3182a73ea3
PubMed: 23965945

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<front><div type="abstract" xml:lang="en">The purpose of this investigation was to determine whether stronger individuals are able to express postactivation potentiation (PAP) earlier than weaker individuals during a vertical squat jump test. Eighteen junior elite rugby league players were divided into strong (relative 1 repetition maximum [1RM] back squat ≥ 2 × body mass) and weak (relative 1RM back squat <2.0 × body mass) groups. Each subject performed squat jumps before, 15 seconds, 3, 6, 9, and 12 minutes after a conditioning activity (CA) that contained 1 set of 3 back squats performed at 90% of 1RM. A force plate, which sampled at 1000 Hz, was used to determine the power output and height for each squat jump. Stronger individuals expressed PAP between 3 and 12 minutes post-CA, whereas their weaker counterparts displayed potentiation between 6 and 12 minutes post-CA. Moreover, the stronger group exhibited a significantly (p ≤ 0.05) higher PAP response than the weaker group at all post-CA squat jump tests. The stronger group displayed the greatest potentiation at 6 minutes post-CA, whereas the weaker group displayed the greatest potentiation response at 9 minutes following the CA. Based on these results, stronger individuals appear to be able to express PAP earlier after a CA than weaker individuals. Additionally, stronger individuals express significantly greater postactivation responses than weaker individuals. From a practical standpoint, strength and conditioning coaches should consider the athletes' strength levels when constructing postactivation complexes (CA + performance activity) as strength will dictate the time frame required between the conditioning and the performance activity.</div>
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<Abstract><AbstractText>The purpose of this investigation was to determine whether stronger individuals are able to express postactivation potentiation (PAP) earlier than weaker individuals during a vertical squat jump test. Eighteen junior elite rugby league players were divided into strong (relative 1 repetition maximum [1RM] back squat ≥ 2 × body mass) and weak (relative 1RM back squat <2.0 × body mass) groups. Each subject performed squat jumps before, 15 seconds, 3, 6, 9, and 12 minutes after a conditioning activity (CA) that contained 1 set of 3 back squats performed at 90% of 1RM. A force plate, which sampled at 1000 Hz, was used to determine the power output and height for each squat jump. Stronger individuals expressed PAP between 3 and 12 minutes post-CA, whereas their weaker counterparts displayed potentiation between 6 and 12 minutes post-CA. Moreover, the stronger group exhibited a significantly (p ≤ 0.05) higher PAP response than the weaker group at all post-CA squat jump tests. The stronger group displayed the greatest potentiation at 6 minutes post-CA, whereas the weaker group displayed the greatest potentiation response at 9 minutes following the CA. Based on these results, stronger individuals appear to be able to express PAP earlier after a CA than weaker individuals. Additionally, stronger individuals express significantly greater postactivation responses than weaker individuals. From a practical standpoint, strength and conditioning coaches should consider the athletes' strength levels when constructing postactivation complexes (CA + performance activity) as strength will dictate the time frame required between the conditioning and the performance activity.</AbstractText>
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The temporal profile of postactivation potentiation is related to strength level.

The temporal profile of postactivation potentiation is related to strength level.

Source :

Descripteurs français

English descriptors

Abstract

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