Nine men underwent three sessions of exercise at 70 % VO2peak until exhaustion as follows : 1 ) hypoxia with a placebo ; 2 ) hypoxia with 8 % maltodextrin ( 200 mL/20 min ) during exercise and for 2 h after ; and 3 ) hypoxia after 6 d of glutamine supplementation ( 20 g/d ) and supplementation with 8 % maltodextrin ( 200 mL/20 min ) during exercise and for 2 h after .