Seated alternating hip flexion strengthens the hip flexors from a seated position. The seated position is safer than the standing version of this exercise and is intended for people who are at higher risk of falls.
Begin by sitting upright at the edge of a chair with your knees bent and feet flat on the floor.
Raise one knee up towards the ceiling while keeping the other foot flat on the floor. The back of your thigh should lift off the chair. Slowly lower it back down. Then repeat on the other side.