Energy expenditure during sport activities has been determined by the Motion Time Study. However, this method does not yield accurate values. Therefore, this study measured oxygen uptake (VO2) by a portable apparatus. The aim of this study was to determine accurate energy expenditure during various soccer training. Methods The subjects were fourteen soccer players. Measured variables were VO2, energy expenditure, metabolic equivalents (MET), heart rate (HR) and blood lactic acid (La) during various soccer training. Maximum oxygen uptake and maximum heart rate were determined by running on a motor-driven treadmill until subjects become exhausted. VO2 and HR during the training were measured throughout the training using a portable apparatus. Total weight of the apparatus each subject carried during training was about 1700g. The training contents were nine items, and it was five minutes each in measurement time. Results & Discussion Average values of VO2 and %VO2max, energy expenditure, MET, HR and %HRmax, and La were 1.0~2.7l/min and 26.4~69.5%, 104.2~280.1kJ, 4.1~10.7METs, 93.5~165.4beats/min and 48.3~85.9%, and 1.1~5.5mmol/l, respectively. Previous studies have reported that energy expenditure values of training day were 5.6~7.6MJ/day, however this energy expenditure values were estimated values and were not examined in detail. Energy expenditure of soccer training has not been examined in detail.
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