Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/6513
Título: Effects of eccentric exercise on cycling efficiency
Autores/as: Moysi, JS 
Garcia-Romero, Jerónimo
Alvero-Cruz, José Ramón
Ara, Ignacio
Dorado, C
Dorado, Cecilia 
Calbet, José A.L. 
Clasificación UNESCO: 241106 Fisiología del ejercicio
Palabras clave: Performance
Fatigue
Muscle soreness
Lactate
Triathlon
Fecha de publicación: 2005
Publicación seriada: Canadian Journal of Applied Physiology 
Resumen: The aim of this study was to find out whether the efficiency of concentric muscle contraction is impaired by eccentric squatting exercise. The study involved 25 male physical education students in two experiments. In the first experiment 14 subjects undertook cycling exercise at 65% VO(2)max until exhaustion on two occasions. During the experimental condition their cycling was interrupted every 10 min so they could perform eccentric squatting exercise, whereas in the control condition they rested seated on the bike during the interruptions. Eccentric squatting consisted of 10 series of 25 reps with a load equivalent to 150% of the subject's body mass on the shoulders. During the first experiment gross efficiency decreased (mean +/- SE) from 17.1 +/- 0.3 to 16.0 +/- 0.4%, and from 17.2 +/- 0.3 to 16.5 +/- 0.4%, between the 2nd and 9th cycling bouts of the experimental and control conditions, respectively (both p < 0.05). The reduction in cycling efficiency was similar in both conditions (p = 0.10). Blood lactate concentration [La] was higher during the experimental than in the control condition (p < 0.05), but substrate oxidation was similar. MVC was decreased similarly (25-28%) in both conditions. The 11 subjects participating in the second experiment undertook 25 reps of eccentric squatting exercise only, each with a load equivalent to 95% of his maximal voluntary contraction (MVC), repeated every 3 min until exhaustion. One hour after the end of the eccentric squatting exercise series cycling, VO(2) and gross cycling efficiency were comparable to the values observed before the eccentric exercise. Both experimental protocols with eccentric exercise elicited similar muscle soreness 2 days later; however, at this time cycling efficiency was similar to that observed prior to eccentric exercise. The interposition of cycling exercise between the eccentric exercise bouts accelerated the recovery of MVC. We conclude that eccentric exercise does not alter or has only a marginal effect on gross cycling efficiency even in presence of marked muscle soreness.
URI: http://hdl.handle.net/10553/6513
ISSN: 1066-7814
DOI: 10.1139/h05-119
Fuente: Canadian Journal of Applied Physiology[ISSN 1066-7814],v. 30, p. 259-275
Colección:Artículos
miniatura
Effects of eccentric exercise on cycling efficiency
Adobe PDF (154,38 kB)
Vista completa

Citas SCOPUSTM   

11
actualizado el 24-mar-2024

Citas de WEB OF SCIENCETM
Citations

10
actualizado el 25-feb-2024

Visitas

78
actualizado el 02-mar-2024

Descargas

207
actualizado el 02-mar-2024

Google ScholarTM

Verifica

Altmetric


Comparte



Exporta metadatos



Este elemento está sujeto a una licencia Licencia Creative Commons Creative Commons