Place your forearms are on the pads of the leg raise machine and grip the handles or bars. Your arms should be bent at 90 degrees and your upper arms in line with your torso. Your torso should be straight and your lower back pressed against the pad of the bench if using one. Keep your legs extended. Proceed to bring your knees up towards your chest, until you have a 90 degree angle between your torso and your thighs. This is your position. Continue to inhale and exhale with control as you hold the position. Hold for the required amount of time and then rest.