Did you know that over 40% of people drop out of a fitness class shortly after joining—unless they sign up with a friend? In that case, the dropout rate plummets to just 6%. Clearly, working out with a buddy has real staying power. There’s something about training with a friend that makes the experience more…

Growing up, all I ever wanted was the “biceps vein!” I wanted it even more than huge biceps. Of course, big arms help push that vein out, and being lean is important too—too much body fat will hide your vascularity. Bodybuilders use several tricks to bring out vascularity during competition. Drugs aside, glycerol helps… and…