How to strengthen the leg muscles, knees and spine?

strenthen leg musclesEveryone wants to keep their health fit. Commonly we used to go for jogging. Sometimes we could not go out for many reasons. Hence the exercise could not be. Are you feeling for it? Don’t worry. You can do Uttanasana in your house itself. so that you can burn the calories. Doing this exercise your leg muscles, knees and spine got strengthening. It reduces your weight also.