Lie on your back, knees bent, arms at your sides. On an empty stomach, inhale deeply, then exhale while drawing your abs toward your spine and emptying your lungs. Hold 15 seconds, working up to one minute, and repeat 3–5 times. Total exercise time should exceed two minutes. Skip or modify if you have heart disease, herniated discs, asthma, or stomach issues, as the move raises intra-abdominal pressure.
