The sidelying quad stretch is a great way to get a good stretch to your quads. Being on the floor in a supported position can help you focus in on the stretch in your quads. Here is how you do the sidelying quad stretch:
Lie on your side.
Bend the knee of your top leg as far as you are able.
Maintain position for 30 seconds.
Return to starting position.
Repeat exercise 3 to 5 more times with each leg.