Sit with your feet slightly wider than shoulder-width apart and with an upright posture.
Reach your arms out in front of you at shoulder height with your palms facing down.
Keeping your back straight, raise your left knee to meet your left hand and lower your leg back down. Then raise your right knee to meet your right hand and put your leg back down.
Continue to alternate at a slow-to-moderate pace for 30 seconds straight, and rest for 15 seconds.