Fill a back pack with as many books as you want to use as weight.
2. Place your feet about shoulder width apart and flex your abdominal muscles to keep your spine neutral.
3. Slowly go down by flexing one leg and sliding the other on the ground.
4. You should completely feel the stretch in the inner thigh of the extended leg.
5. After that, Push both feet to the ground to return to the starting position.
Doable at:
Muscle group/groups:
Working muscle/muscles:
