Exercise form is important for increasing your gains and protecting yourself from injury. But when’s the last time you thought about the way you hold yourself between sets? In a recent study, scientists from Western Washington University set out to find out what works best when you’re gasping for air: standing up with your hands behind your head or bending over with your hands on your knees. The result: Bending over Michael Jordan-style reduces your heart rate by 22 more beats per minute (BPM) than staying upright does.