Sit on the floor with one leg extended and the other knee bent so the foot is near your glutes. Reach back to grasp the ankle of the bent leg and gently pull the heel toward your body until you feel a stretch along the front of the thigh. Keep your back straight and breathe steadily, then switch sides.
Log your seated quadriceps stretch sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.