Continuing with their Amazon #1 best-selling series, Jailhouse Strong, Bryant and benShea return to deliver a guide on interval training. Instead of performing endless hours of long, slow cardio that makes you weaker, slower, and eats away at your muscle, Jailhouse Strong Interval Training is a time efficient way to lean out and harden up. Whether inside a posh gym or limited by space inside a cramped hotel room, the workout programs included inside...