Ankle Sprain Rehabilitation and Hip Flexor Overactivity 

Ankle sprains can cause major problems for the entire body. When an ankle sprain occurs due to lack of ankle mobility, usually a lack of dorsiflexion on the right side, a sprain will occur because the ankle is rigid rather than stable.
Feet and ankle proprioceptive information is sent to the brain so our brain can determine our activity, orientation, and movement is space. It is a vital part of our upright balance system, called the vestibular system.
An ankle sprain injury removes a vital source of sensory input from your brain's equations, and muscular activity will be altered in an attempt to not fall and suffer further injury. Your brain will start to overuse hip flexors, back extensors, and neck muscles to stabilize your body and move you forward in the absence of the ability to push.
What should be temporary changes to allow an ankle sprain to heel can turn into permanent changes of compensatory movement if rehabilitation doesn't occur in the proper context of gait re-training.
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