sentence: A man in orange shorts exercises by jumping on a stack of workout mats. sentence:  The man in the orange shorts works out on leg extensions on a leg extension machine. sentence:  Two men work out on a rowing machine The man in the orange shorts works out on a different rowing machine. sentence:  A close up of a man wearing a blue tank top works out on a rowing machine. sentence:  Different scenes of a group of people running on treadmill machines. sentence:  Different men working out by jumping on the stack of floor mats.