Effect of dietary manipulation on a high intensity performance test.
The effects of dietary manipulation (low- or high-carbohydrate) on performance of a short-duration exercise were studied with endurance- and intermittent-trained athletes. Eight subjects performed a depletion drill of 10 one minute workbouts at 7 W/kg and 85 rpm on a cycle ergometer. The subjects followed a dietary regimen of three days on a low-carbohydrate diet followed by three days on a high-carbohydrate diet. Muscle biopsy samples were taken immediately prior to and immediately after the testing sessions. Dietary manipulation did not affect resting muscle glycogen levels. However, subjects accustomed to continuous training regimens used less glycogen, produced less muscle lactate and exercised longer than subjects accustomed to intermittent training programs. These biochemical changes appeared to be related to the fibre type distribution and the training background of the athletes.
Ratz
S R
SR
Pettigrew
F P
FP
Noble
E G
EG
Taylor
A W
AW
D000328:Adult; D004040:Dietary Carbohydrates / Q000008:administration & dosage* / Q000378:metabolism; D006003:Glycogen / Q000378:metabolism; D006801:Humans; D007773:Lactates / Q000378:metabolism; D008297:Male; D009132:Muscles / Q000378:metabolism; D010807:Physical Endurance; D011597:Psychomotor Performance
D004040:Dietary Carbohydrates; D007773:Lactates; D006003:Glycogen