中程度の強度の運動と運動後の食事が心拍数および代謝産物レベルに与える影響について

The influences of moderate intensity exercise and a meal postexercise on heart rate
and metabolic substrates were studied， Eight college students. who had not been engaged
in regular endurance training. participated in this study. They exercised on a bicycle
ergometer for 30 min at 60% of their maximum V02. They were given a meal(500
kcal) and water 3 hours after cessation of the exercise. The heart rate was monitored
continuously. Blood level of glucose and lactate and serum level of glycerol and non
esterified fatty acid(NEFA) were measured before. during and following the exercise
at selected time points.
Heart rate was elevated during the exercise from preexercise control value. It remained
elevated as compared with the control value in postexercise period of 6 hours
long. The meal postexercise caused the elevation of heart rate. The lactate increased
during the exercise and returned to the control value by 3 hours postexercise. The glucose
was not affected by the exercise but was elevated by the meal, the elevation lasting
for 2 hours. The NEFA increased during the exercise and it was kept elevated during
the postexercise period until the meal was taken. The exercise induced an increase
in glycerol. The glycerol leveln returned to the control value by the time point for the
meal.
The results suggest that the exercise with the intensity of 60% VO2 max. enhances
overall postexercise metabolism for at least 6 hours. The results also suggest that the
meal switches postexercise metabolism toward predominence of carbohydrate metabolism.