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Titolo:
EFFECT OF VERTICAL LOADING ON ENERGY-COST AND KINEMATICS OF RUNNING IN TRAINED MALE-SUBJECTS
Autore:
BOURDIN M; BELLI A; ARSAC LM; BOSCO C; LACOUR JR;
Indirizzi:
FAC MED LYON SUD,PHYSIOL LAB,INTERET PUBL EXERCICE GRP,BP 12 F-69921 OULLINS FRANCE FAC MED LYON SUD,PHYSIOL LAB,INTERET PUBL EXERCICE GRP F-69921 OULLINS FRANCE
Titolo Testata:
Journal of applied physiology
fascicolo: 6, volume: 79, anno: 1995,
pagine: 2078 - 2085
SICI:
8750-7587(1995)79:6<2078:EOVLOE>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEG EXTENSOR MUSCLES; SHORTENING CYCLE EXERCISE; MECHANICAL EFFICIENCY; SKELETAL-MUSCLE; OXYGEN-UPTAKE; BODY-MASS; ENERGETICS; POWER; LOCOMOTION; MOVEMENT;
Keywords:
MECHANICAL ENERGY; STRETCH-SHORTENING CYCLE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
42
Recensione:
Indirizzi per estratti:
Citazione:
M. Bourdin et al., "EFFECT OF VERTICAL LOADING ON ENERGY-COST AND KINEMATICS OF RUNNING IN TRAINED MALE-SUBJECTS", Journal of applied physiology, 79(6), 1995, pp. 2078-2085

Abstract

This investigation examined, in a group of 10 trained male runners, the effect of vertical loading during level treadmill running at a velocity of 5 m/s. The net energy cost of running (C-r), the external workof the center of mass of the body (W-ext; both expressed in J . kg(-1) . m(-1)), and the eccentric-to-concentric ratio (Ecc/Con) of integrated electromyographic activity for the vastus lateralis (VL) and gastrocnemius lateralis muscles were measured. It was observed that W-ext and Ecc/Con for the VL could explain a large part of the interindividual variations in C-r. This result reinforces the hypothesis that Ecc/Con could be a good index of effectiveness in the stretch-shortening cycle. When the subjects ran with a vertical load of 9.3% of their body mass, C-r and W-ext were significantly reduced (P < 0.01 and P < 0.05, respectively), whereas Ecc/Con for the VL and gastrocnemius lateralis remained unchanged. The variations in C-r and W-ext due to vertical loading were significantly correlated (r = 0.75; P < 0.01). It was then concluded that the significant improvement of C-r observed with the added load was mainly due to the fact that W-ext was significantly decreased.

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Documento generato il 07/07/20 alle ore 05:20:18