Energy Metabolism in Skiing (2) : A Comparison of Upright Position and Crouching Position during Wedeln

The purpose of this study was to compare the energy metabolism of upright position and crouching position during wedeln. The subject performed for 3 min at 90 times / min frequency with the two different positions on the ski-trainer. Each trial repeated 3 times in successive 3 days. Oxygen uptake，heart rate and respiration rate were measured throughout the exercise and recovery period. The results of this study were as follows 1). The average oxygen requirement，oxygen debt，net oxygen uptake in exercise and relative metabolic rate (R.M.R.) of the upright position and crouching position were 2.658±0.165 ℓ and 4.522± 0.277 ℓ，0.555±0.173 ℓ and 1.464±0.206 ℓ， 2.103±0.177 ℓ and 3.058±0.255.eand 5.6±0.3 and 9.5±0.6，respectively. 2). The average peak heart rate and peak respiration rate of the upright position and crouching position were 112.3±3.8and 142.0±4.4 beats/ min and 43.0±1.7 and 51.3±4.6 times/ min， respectively. 3). Heart rate and respiration rate of the upright position returned to the level of rest more rapidly than the crouching position. 4). On the basis of the above mentioned findings,it seemed to suggest the upright position was advantageous method in regard to energy expenditure