POSTEXERCISE ENERGY-EXPENDITURE IN RESPONSE TO ACUTE AEROBIC OR RESISTIVE EXERCISE

Postexercise energy metabolism was examined in male subjects age 22-35 years in response to three different treatments: a strenuous bout of resistive exercise (REx), a bout of stationary cycling (AEx) at 50% pe ak VO2, and a control condition (C) of quiet sitting. Resting metaboli c rate (RMR) was measured the morning of and the morning following eac h condition. Recovery oxygen consumption (RcO(2)) was measured for 5 h r following each treatment. Total 5-hr RcO(2) was higher for the REx t reatment relative to both AEx and C, with the largest treatment differ ences occurring early during recovery. There were no large treatment d ifferences in postexercise respiratory exchange ratio values, except f or the first hour of recovery following REx. RMR measured 14.5 hr post exercise for the REx condition was significantly elevated compared to C. These results suggest that strenuous resistive exercise results in a greater excess postexercise oxygen consumption compared to steady-st ate endurance exercise of similar estimated energy cost.