Each year millions of US workers get the first Monday of September off work to celebrate the achievements of American workers over the years. But the men we're checking out today don't take any time off... working on those bawdies. This Labor Day we're checking out the real backbone of this country, the sexy, ripped THOTS who have shown off their muscles in their shirtless workout scenes. Hit up the gallery below for everyone from K.J. Apa to Chris Hemsworth to Michael B. Jordan to Nick Jonas!

10 Best Shirtless Workout Scenes