Quadriceps Prone Stretch
You can also stretch your quads while lying on your stomach. The floor helps to maintain your pelvis in this posture, limiting rocking and enhancing stretch.
Place your hands on your stomach.
Bend your knee as far back as you can. Grab your ankle and move your foot towards your buttocks.
Hold your position for 30 seconds.
Return to your starting point.
Repeat the exercise 3 to 5 times more with each leg.
If reaching your ankle to lift your leg up is tough, put a towel or strap around your ankle and pull with that. Even if you can't readily reach your ankle, this can help you get a good stretch in your quads.