Kneel on the floor with your hands at your sides. Resist the urge to sit back and rest your weight on your heels. Your back should be straight and your knees bent at a 90-degree angle (A). Keeping your head and spine in line with your thighs, slowly lean back a few inches (B). Hold for 3 seconds, then return to the starting position. Do 5 to 10 reps.
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