Sit with the legs stretched out in front of you. Come into Yoga Mudra by interlacing the fingers behind the back, keeping the elbows straight. Inhale in 4 parts as you bend forward from your hips, raising your arms up as high as possible, stretching them away from the shoulders. Exhale in one breath as you return upright. Continue rhythmically coordinating the movement with the breath for 2 minutes. This exercise promotes endurance.