For your knee, we have to strengthen it.
1.Sit on a chair and raise your leg up and put it down again,repeat this for 10 times in a set of two.After few weeks, repeat the same exercise with little ankle weights, if you can manage.
2.Roll up a towel or a cloth to form a cylindrical type format and keep that under your knee with the leg extended, try to press that with the knee and then release, do this for 4-5 times.
You can follow these two exercises for a better and stronger knee muscle:))
