MUSCLE FIBRE AREA, FIBRE TYPE & CAPILLARIZATION IN MALE AND FEMALE BODY BUILDERS

Authors
  1. Bell, D.G.
  2. Jacobs, I.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The effects of long-term strength training on skeletal muscle fibre characteristics were evaluated in nine body builders (BB) (five males and four females) and ten control subjects (six females and four males). Muscle fibre area, percentage fibre type, and capillary supply were compared between the BB and controls as well as between the males and females with a two-way analysis of variance design. For the fast-twitch fibre area (FTa), the BB had larger areas than the controls, and males had larger areas than females. The analysis for the slow-twitch fibre areas (STa) showed only a training effect; BB had a larger STa than controls. The FTa in the untrained females and the female BB were similar to their STa; in contrast, both male groups and significantly larger FTa than STa. The BB had significantly more capillaries per fibre than the control groups but the number of capillaires/square mm were similar in all groups. TRUNCATED
Report Number
DCIEM-90-P-10 — Research Paper; Reprint
Date of publication
01 Jan 1990
Number of Pages
5
Reprinted from
Can J Spt Sci, vol 15, no 2, 1990, p 115-119
DSTKIM No
90-04151
CANDIS No
66392
Format(s):
Hardcopy;Originator's fiche received by DSIS

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