Tal vez este estudio nos dé algunas pistas:
Med Sci Sports Exerc 2001 Aug;33(8):1297-303 Related Articles, Books, LinkOut
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Muscular characteristics of detraining in humans.
Mujika I, Padilla S.
Departamento de Investigacion y Desarrollo, Servicios Medicos, Athletic Club de Bilbao, Basque Country, Spain.
[email protected]
Skeletal muscle is characterized by its ability to dynamically adapt to variable levels of functional demands. During periods of insufficient training stimulus, muscular detraining occurs. This may be characterized by a decreased capillary density, which could take place within 2--3 wk of inactivity. Arterial-venous oxygen difference declines if training stoppage continues beyond 3--8 wk. Rapid and progressive reductions in oxidative enzyme activities bring about a reduced mitochondrial ATP production. The above changes are related to the reduction in VO(2max) observed during long-term training cessation. These muscular characteristics remain above sedentary values in the detrained athlete but usually return to baseline values in recently trained individuals. Glycolytic enzyme activities show nonsystematic changes during periods of training cessation. Fiber distribution remains unchanged during the initial weeks of inactivity, but oxidative fibers may decrease in endurance athletes and increase in strength-trained athletes within 8 wk of training stoppage.
Muscle fiber cross-sectional area declines rapidly in strength and sprint athletes, and in recently endurance-trained subjects, whereas it may increase slightly in endurance athletes. Force production declines slowly and in relation to decreased EMG activity. Strength performance in general is readily maintained for up to 4 wk of inactivity, but highly trained athletes' eccentric force and sport-specific power, and recently acquired isokinetic strength, may decline significantly.
Publication Types:
* Review
* Review, Tutorial
PMID: 11474330 [PubMed - indexed for MEDLINE]
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Comentarios: Ok, aqui vemos que la fuerza puede ser mantenida hasta un mes después de no entrenamiento, pero todos sabemos por experiencia que la masa no, verdad ? Qué indica esto ? que los caminos neurales se degradan más lentamente que la pérdida de masa muscular en un período de no entrenamiento, lo que apoya lo que dije que la adaptación neuromuscular no puede explicar de manera satisfactoria la rápida ganancia muscular despues de un período de no entrenamiento para una persona con un buen nivel de entrenamiento previo.
Saludos.