Purpose: The aim of this study was to test the effect of 50 gr changes in sport shoes' weight on Vo2max and running economy during 15 minutes running protocol. Method: 15 active males (age of 24.60 ± 2.06; height of 178 ± 5.83 cm) were selected in this study. Subjects ittrcicitrap in a 15 minutes running protocol in three running speeds of 4, 6 and 8 km/h. Total time for each running speed was ...