After complete flexion of the hip , the lumbar spine will flex if movement is continued. The risk of injury is increased if the lumbar spine is not accustom to this movement or workload. Increased risk of lower back injury during hip flexion and extension and overhead standing activities. During extension activies, the lower back can hyperextend more than usual if the hip can not fully extend . During hip flexion activities, the Iliopsoas can hyperextend spine during hip flexor activities.
Risk is compounded when hip flexor inflexibility is combined with abdominal weakness .
Lunging Hip Flexor Stretch Quadriceps Stretch External Shoulder Rotation Inflexibility Increased risk of shoulder injury during activities involving external rotation of the shoulder. Risk is compounded with a winged scapula condition . Infraspinatus Broom Stick Stretch Iliotibial Band Tightness Increased risk of lateral knee injury during knee extension activities. While weight bearing during knee flexion , the Tensor Fascia Latea contracts to help stabilize the pelvis from lateral movement and the Gluteus Maximus extends the hip for forward locomotion. Both the Tensor Fascia Latea and the Gluteus Maxiums can place tension on the Iliotibial tract which produces repetitive friction on the lateral epicondyle.