@ adolescents ( @ male , @ years old ) completed three @-day trials in a randomised order : ( @ ) rest ( CON ) ; or four bouts of ( @ ) @ min cycling at @ % peak power with @ s recovery ( high-intensity interval exercise ; HIIE ) ; or ( @ ) cycling at @ % of the gas exchange threshold ( moderate-intensity exercise ; MIE ) , which was work-matched to HIIE .