Mountain Biking and Hip Pain

Hip flexibility is needed to relieve pressure on the knee and lumbar. During cycling the hip remains in a flexed position. Chronic tightness through TFL/ITB, iliopsoas and adductors is very common. This can lead to hip and groin problems. Gluteal and hamstring range needs to be maintained to sit comfortably in lumbar flexion, and avoid  falling too far into posterior tilt. Most hip and groin pain is related to the lumbar spine and pelvis. Acupuncture resolves pain issues.
(reference: Sports Injury Bulletin/Sean Fyfe)