As a fitness conscious individual, you always look to perform exercises that benefit your body in a number of ways. You look to build your muscles, increase your body strength, cut some weight, tone your body muscles and keep fit among other things.
One of the rare sights in a gym is someone leaning on a wall with their feet firmly on the floor and knees held at 900 to the floor. These are called wall sits (squats). Whenever someone spots me doing the squats, they normally think I am wasting my precious gym time.