But Metzl said that extreme exertion—i.e. burpees—release endorphins, which give us the boost we need to get through our day.

Max Olesker transformed himself from schlubby everybloke into muscle-bound superhero. The idea: to investigate, first-hand, ...

They just keep them in place but will slide off if bumped. I assume this is helpful for people with arthritis. It's an easy ...