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Titolo:
The role of maximal strength and load on initial power production
Autore:
Cronin, JB; McNair, PJ; Marshall, RN;
Indirizzi:
Auckland Univ Technol, Sch Physiotherapy, Sport Performance Ctr, Auckland 1020, New Zealand Auckland Univ Technol Auckland New Zealand 1020 ckland 1020, New Zealand Auckland Univ Technol, Sch Physiotherapy, Neuromuscular Res Unit, Auckland1020, New Zealand Auckland Univ Technol Auckland New Zealand 1020 uckland1020, New Zealand Univ Auckland, Dept Exercise & Sport Sci, Auckland 1, New Zealand Univ Auckland Auckland New Zealand 1 Sport Sci, Auckland 1, New Zealand
Titolo Testata:
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
fascicolo: 10, volume: 32, anno: 2000,
pagine: 1763 - 1769
SICI:
0195-9131(200010)32:10<1763:TROMSA>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRETCH-SHORTENING CYCLE; UPPER-BODY MOVEMENTS; MUSCLE ACTIVATION; ELASTIC ENERGY; EXERCISE; KINEMATICS; KINETICS;
Keywords:
muscle power; bench press; enhancement;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Cronin, JB Auckland Univ Technol, Sch Physiotherapy, Sport Performance Ctr, Private Bag 92006, Auckland 1020, New Zealand Auckland Univ Technol Private Bag 92006 Auckland New Zealand 1020
Citazione:
J.B. Cronin et al., "The role of maximal strength and load on initial power production", MED SCI SPT, 32(10), 2000, pp. 1763-1769

Abstract

Purpose: The influence of maximal strength, as measured by the maximal load lifted for one repetition (1RM), on power production in the initial 200 ms of the concentric phase for both rebound and nonrebound movements was investigated. We also investigated the effect of external load upon this relationship. Methods: Twenty-seven male subjects (21.9 +/- 3.1 yr, 89.0 +/- 12.5 kg) were separated by previously determined bench press 1RM into high (100.88 +/- 7.24 kg) and low (72 +/- 6.61 kg) RM groups. Concentric only benchpresses and rebound bench presses were compared between and within groups to note the effect of RM across external loads of 40%, 60%, and 80% 1RM, oninstantaneous, mean, and peak power output. Results: The results of this study clearly indicated the enhancement of concentric motion by prior eccentric muscle action (336-1332% enhancement in the first 20 ms). Possessing a high RM augmented power production in the initial 200 ms of stretch-shortencycle activity, across all the external resistances tested (P < 0.05). Thetemporal characteristics of this enhancement, however, differed across loads. That is, 80% 1RM loading showed a later time to peak enhancement (80 msvs 20 ms). Interestingly, the influence of RM on concentric only motion inthe initial 200 ms across the external resistances tested was found to be nonsignificant. Conclusions: The results suggest that the role of maximal strength during initial power production between concentric and stretch-shorten cycle activity differs, which has important implications for the training of athletes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 04:52:03