Lie face down on the floor or a mat, bend one knee and bring your heel toward your glutes, then have a partner or use a band to gently pull your foot closer until you feel a stretch in the front of your thigh. Keep your hips pressed down and hold the stretch, then slowly release and switch sides.
Log your assisted prone lying quadriceps stretch sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.