Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. The major muscle in ...
THE BENCH PRESSES, cable crossover machines, and dumbbell pullovers of the world are all great for building up your chest. But even if you can't access any of that gear when you're at home, you can ...