AND CLYDE WILLIAMS. Effect of training on muscle metabolism

1989.-Sixteen subjects volunteered for the study and were divided into a control (4 males and 4 females) and experimental group (4 males and 4 females, who undertook 8 wk of sprint training). All subjects completed a maximal 30-s sprint on a nonmotorized treadmill and a 2min run on a motorized tread-mill at a speed designed to elicit 110 % of maximum oxygen uptake (110 % run) before and after the period of training. Muscle biopsies were taken from vastus lateralis at rest and immediately after exercise. The metabolic responses to the 110 % run were unchanged over the 8-wk period. However, sprint training resulted in a 12 % (P < 0.05) and 6 % (NS) improvement in peak and mean power output, respectively, during the 30-s sprint test. This improvement in sprint per-formance was accompanied by an increase in the postexercise muscle lactate (86.0 t 26.4 vs. 103.6 & 24.6 mmol/kg dry wt,