What are the best hip flexor exercises?

The best exercise for hip flexors is mountain climbers, focusing strongly on the primary psoas muscle in the hip flexor group, according to training specialist Matt Biss writing for BodyBuilding.com. A stretching regimen is also recommended by Biss to release tension due to lack of use of this muscle group.

Calisthenic Exercise explains how hip flexors are put into use during sit-ups, especially when the feet are held down. With the feet held down, the hip flexors become the major muscles doing the work in the sit-up, and they also come into play when legs are bent, aiding in the lowering of the body.