total bs you don't need that much endurance straight out of the box. slimming down is always easy, after all. gaining muscle is much, much harder. that means that if they teleport those three dudes into the stone age, they'll all go down in weight, even the twink would, of slightly. because he looks like his training consists solely of using gamepads and dildos, he would face the most trouble adopting. those two guys probably trained hundreds if not thousands of hours. they'll have more cardio now, big deal. cardio is easy to adopt towards. if you'd teleport them into the bronze age, it would be even worse. he'd immediately become a fucktoy while the other guys would be welcomed as potential warriors.
Germany