Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/50988
Title: Effect of high-intensity running in rectus femoris muscle fiber in rats
Authors: Díaz-Herrera, Pilar 
García-Castellano, José M.
Torres, Ana
Morcuende, José A.
Calbet, JAL 
Sarrat, René
UNESCO Clasification: 241106 Fisiología del ejercicio
Keywords: Weight-Lifting Exercise
Skeletal-Muscle
Immobilization
Capacity
Issue Date: 2001
Publisher: 0736-0266
Journal: Journal of Orthopaedic Research 
Abstract: The effect of a 12‐week high‐intensity intermittent exercise program on fiber type composition and the oxidative capacity of rectus femoris skeletal muscle from 20 male Wistar rats (Trained, n = 10; Sedentary, n = 10) was histochemically determined. The training exercise program was developed in a motorized treadmill. It consisted of four running bouts of 2 min duration at 48 m/min, alternated with recovery intervals of 4 min. Training increased relative cross‐sectional area of oxidative fibers (I, IIA, IIX) and decreased the same parameter in type IIB non‐oxidative fibers (P < 0.001). Our results suggest that this type of strength exercise program is enough to induce changes in muscle fiber composition. This opens a possibility to use this kind of exercise in preventing and treating muscle atrophy. © 2001 Orthopaedic Research Society. Published by Elsevier Science Ltd. All rights reserved.
URI: http://hdl.handle.net/10553/50988
ISSN: 0736-0266
DOI: 10.1016/S0736-0266(00)00031-0
Source: Journal Of Orthopaedic Research[ISSN 0736-0266],v. 19 (2), p. 229-232
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