MUSCLE FIBER-SPECIFIC GLYCOGEN UTILIZATION IN STRENGTH-TRAINED MALES AND FEMALES

Authors
  1. Bell, D.G.
  2. Jacobs, I.
  3. Laufer, J.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The study evaluated the effect of strength training on glycogen utilization in slow twitch (ST) and fast twitch (FT) muscle fibers during repeated maximal unilateral isokinetic leg extensions. Strength-trained (5 males, 4 females) and untrained (4 males, 6 females) subjects performed three sets of 50 maximum voluntary contractions (MVC) at this velocity. Glycogen content of the fibers was quantified as optical density (OD). Analysis of variance with repeated measures yielded the following results: OD, i.e., glycogen, was reduced similarly in both fiber types after exercise, but only in the males (P = 0.02); there was no significant main effect of training status per se (i.e., strength-trained vs untrained). These results indicate that years of strength training do not change the pattern of muscle fiber-specific glycogen utilization during repeated dynamic MVCs.
Report Number
DCIEM-89-P-40 — Research Paper; Reprint
Date of publication
01 Jan 1989
Number of Pages
6
Reprinted from
Medicine and Science in Sports and Exercise, vol 21, no 6, 1989, p 649-654
DSTKIM No
90-01109
CANDIS No
63380
Format(s):
Hardcopy;Originator's fiche received by DSIS

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