mybud saidNoticing what guys are wearing is telling me your not focusing on your workout....Focus on dem weights son....BUD
I wish I could...
From being a crotch watcher I can tell a lot of these sweat pants guys go commando. Or else I simply see them dressing in the locker room and know for sure. Maybe full pants makes them less inhibited about going commando, even compared to longer shorts?
But I suspect the suggestion above regarding keeping the muscles warm could be true for some, as well. I do cardio and generate a lot of heat and so wear shorts, and can wear them right into the gym in Florida year-round. And for a different example, professional dancers will also wear special leg warmers, to keep those muscles warm and loose, though usually cover their torsos and arms to a minimum to dissipate the workout heat.
I could therefore see a deliberate logic to a serious bodybuilder choosing to wear sweat pants at times. Well, we've got some here, so what do they say, rather than the rest of us speculating?