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Titolo:
A METHOD FOR ASSESSING MUSCLE FATIGUE DURING SPRINT EXERCISE IN HUMANS USING A FRICTION-LOADED CYCLE ERGOMETER
Autore:
HAUTIER CA; BELLI A; LACOUR JR;
Indirizzi:
FAC MED LYON SUD,LAB PHYSIOL GIP EXERCISE,BP 12 F-69921 OULLINS FRANCE FAC MED LYON SUD,LAB PHYSIOL GIP EXERCISE F-69921 OULLINS FRANCE UNIV CLERMONT FERRAND,UFR STAPS,LAB PERFORMANCE MOTRICE F-63172 AUBIERE FRANCE UFR STAPS,LAB SCI SPORT F-25000 BESANCON FRANCE
Titolo Testata:
European journal of applied physiology and occupational physiology
fascicolo: 3, volume: 78, anno: 1998,
pagine: 231 - 235
SICI:
0301-5548(1998)78:3<231:AMFAMF>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTENSITY INTERMITTENT EXERCISE; POWER OUTPUT; CONDUCTION-VELOCITY; MAXIMAL POWER; MEDIAN FREQUENCY; CONTRACTION; RECOVERY; TORQUE; FORCE;
Keywords:
FATIGUE; SPRINT REPETITION; FORCE-VELOCITY; FRICTION-LOADED CYCLE ERGOMETER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
C.A. Hautier et al., "A METHOD FOR ASSESSING MUSCLE FATIGUE DURING SPRINT EXERCISE IN HUMANS USING A FRICTION-LOADED CYCLE ERGOMETER", European journal of applied physiology and occupational physiology, 78(3), 1998, pp. 231-235

Abstract

This study investigated the mechanical changes induced by muscle fatigue caused by repeated sprints and determined whether a friction-loaded cycle ergometer has any advantages for assessing muscle fatigue. Nine subjects performed 15 sprints, each of 5 s with a 25-s rest, on a friction-loaded cycle ergometer. The averaged force, power and velocity of each push-off were calculated. Maximal power decreased by 17.9%, with a concomittent slowing of muscle contraction, but without any change in the maximal force. These results demonstrated that repeated sprints slow down muscle contraction, leading to a fall in maximal power without any loss of force. This would suggest that fast twitch fibres are selectively fatigued by repeated sprints. However, the ergometer used in the present study made it difficult to evaluate the relative influences of contraction velocity and sprinting time. This was certainly the most important limitation. On the other hand, it showed the advantage of measuring instantaneous power and total work dissipated in the environment simultaneously. It also permitted a force-velocity relationship to be obtained from a single sprint and this relationship is known to be closely related to the muscle fibre composition.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 00:29:50