Step 1: Stand with feet hip-width apart, toes pointing forward, arms overhead. Keeping the knees straight, lift your right heel off the ground and reach your left hand toward the ceiling. Place the right heel on the ground and lift the left, allowing the right side to stretch. Return to standing. Step 2: Reach your arms up and allow your weight to shift onto the right leg without bending your knee. Lift your left leg off the ground and drop the left arm to your side. Feel how your head is over your standing foot, where it needs to be for running. Move the other leg around to challenge your balance. Switch sides. Runner’s Secret Weapon: Traditional Pilates does this move in a turned-out position with legs together. By separating them, runners get used to shifting weight onto one leg. This also works the obliques and the outer hips.