Fiber Typing in Aging Muscle


It is accepted widely that fast-twitch muscle fibers are preferentially impacted in aging muscle, yet we hypothesize that this is not valid when aging muscle atrophy becomes severe. In this review, we summarize the evidence of fiber type-specific effect in aging muscle and the potential confounding roles of fibers coexpressing multiple myosin heavy-chain isoforms and their histochemical identification.

Autor / Fonte:Purves-Smith, Fennigje M.; Sgarioto, Nicolas; Hepple, Russell T.. Exercise & Sport Sciences Reviews: April 2014 - Volume 42 - Issue 2 - p 45–52 doi: 10.1249/JES.0000000000000012