TOCOPHEROL MOBILIZATION DURING DYNAMIC EXERCISE AFTER BETA-ADRENERGIC-BLOCKADE

This study addresses the question of whether tocopherol mobilization during exercise could be explained by a lipolysis effect. Nine healthy male subjects were submitted to dynamic exercise of graded intensity (45, 60, 75% VÌ O2max) on a cycle ergometer after ingestion of either a placebo or 40 mg propranolol as βblocker. Plasma tocopherol concentration increased toward a peak value reached during or at the end of exercise. The magnitude of this increase did not differ in the two experimental conditions while plasma free fatty acids concentration was lowered under βadrenergic blockade by propranolol. From these results, we conclude that tocopherol mobilization during dynamic exercise does not depend on lipolysis. © 1990 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.