2. Side Leg-Lift
The side leg-lift can help to strengthen the patellar tendon, and it also happens to be one of the best exercises for helping to strengthen the hips and core. Explaining how to do the side-leg lift is pretty obvious, and it’s exactly what it sounds like – lie on one side while extending one leg and lifting; do this straight up, and without putting too much pressure on the knee.
Several times in a row should count as a full exercise routine if you’re doing this to heal an injured patella tendon: Adding any other exercises to this routine can strain the tendons more than they can handle, especially in the earlier stages of the injury.
The side-leg lift can later become a more advanced exercise with the addition of an ankle weight, but again special care should be taken in order to avoid adding any excess strain to the knee.