Try this exercise to stretch your lower back.

Learn how to do a leg reach exercise to improve your back health.

Use this leg pull exercise to help relieve low back pain.

Try the hip rotator stretch to help your back health.

Learn this exercise called arm reach or "the bird dog" to help strengthen your core muscles.

Try the cat and cow exercise to help strengthen your back muscles.

The abdominal lift exercise helps makes your core muscles stronger.

Straight leg raises can help strengthen your knee.

Heel raises can help rehabilitate your knee.

The free squat can help you rehabilitate your knee after injury.