What is hip flexor stretch (edge of table)?

Hip flexor stretch (edge of table)

1. Lie flat on your back on a table or flat bench, with your knees and lower legs hanging off the edge of the table.
2. Grab one leg at the knee, and pull that knee back toward your chest. Relax the other leg. Let it hang down toward the floor until you feel a stretch in the upper thigh of that leg and hip.
3. Hold the stretch for at least 15 to 30 seconds.
4. Repeat 2 to 4 times for each leg.