Abstract

Eight male subjects exercised to exhaustion on a cycle ergometer at work load equivalent to 95-100 VO2max. The exercise bouts were repeated four times, separated by 1 h-intermissions. Between 5 to 15 min after the first three exercise bouts subjects ingested, glucose approximately 1 g per kg body weight, as a 5 water solution (CHO-trial) or the same amount of water (control). Each subject performed both trials (control and CHO) one week apart. Cardiorespiratory parameters were recorded throughout the test. Blood was taken before and 3 min after each exercise bout for determination of glucose, insulin ammonium, urea, potassium, lactate, and acid-base equilibrium. Glucose ingestion has not influenced the work output during exercise. Glucose and insulin levels before exercise tended to be higher in CHO-trial compared to control. However after exercise the levels of glucose and insulin were similar in both trials. There were no significant differences between trials in any of the other parameters tested. Verf.-Referat