Prolonged Self-Paced Hard Physical Exercise Comparing Trained and Untrained Men.

摘要

Six fit male subjects (25 yr, 180 cm, 72 kg, maximal VO2=2.63 mmol/kg/min to the -1 (59.0 ml/kg/min) and six sedentary m ale subjects (24 yr, 175 cm, 73 kg, maximal VO2=2.01 mmol/kg/min) performed self-paced hard physical exercise while walking over a 17.07 km course consisting of four different terrains (blacktop road, 4.02 km; dirt road, 4.65 km; light brush, 4.35 km; and heavy brush, 4.05 km). All subjects carried no external load, 10 kg, and 20 kg over the entire course. Subjects were instructed to walk over all terrains as fast as possible. Time on each terrain for individual subjects was used to determine walking velocity and predicted energy expenditure; heart rate (HR) and rated perceived exertion were recorded as each subject completed each terrain. Walking velocity and absolute energy expenditure were not different between the two groups ((p > 0.05), and did not decline with time as the subjects traversed the course for any of the load carriage conditions.