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Effect of swim exercise training on human muscle fiber functionThe effect of swim exercise training on the human muscle fiber function was investigated in swimmers trained in a typical collegiate swim-training program followed by an intensified 10-day training period. The measured parameters included the peak tension (P0), negative log molar Ca(2+) concentration (pCa)-force, and maximal shortening speed (Vmax) of the slow-twitch type I and fast-twitch type II fibers obtained by biopsy from the deltoid muscle. The P0 values were found to be not altered after either the training or the 10-day intensive program. The type I fibers from the trained swimmers showed pCa-force curves shifted to the right, such that higher free Ca(2+) levels were required to elicit a given percent of P0. The training program significantly increased the Vmax in the type I fibers and decreased that of the type II fibers, and the 10-day intensive training produced a further significant decrease of the type II fibers.
Document ID
19890039278
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fitts, R. H.
(Marquette Univ. Milwaukee, WI, United States)
Costill, D. L.
(Marquette Univ. Milwaukee, WI, United States)
Gardetto, P. R.
(Marquette University Milwaukee, WI; Ball State University, Muncie, IN, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Journal of Applied Physiology
Volume: 66
ISSN: 0161-7567
Subject Category
Aerospace Medicine
Accession Number
89A26649
Funding Number(s)
CONTRACT_GRANT: NAG2-212
Distribution Limits
Public
Copyright
Other

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