What is a wall sit?

Lets understand our fitness levels with this simple wall sit.
Stand close to a wall, palms facing the wall, and go into a squat as if you were sitting on an invisible chair.

Time your wall sit and please do share it with me.

Here's a diagram showing the basic form:

 A wall sit exercise works the entire muscular system of the lower body and as this is an isometric exercise, the endurance in our lower body muscles improves the longer we hold the position. Balancing in this position provides constant and targeted strain on the thigh muscles and increases the muscle's strength and endurance.

 Practicing this exercise makes it easier to get up and down off the floor and to use the leg muscles to lift heavy objects.

In addition, wall sits can improve performance in running, jumping and other sports activities.