The Effect of Needle Placement on Muscle Stiffness, Gait, Balance, Pain and Functional Outcomes in Individuals With Injury to the Ankle and/or Hindfoot

Few studies have assessed the validity of needling muscles of the lower extremity. For muscles such as the tibialis posterior that are not easily accessible or directly palpable secondary to the deep anatomical position and due to the proximity of the tibial nerve and the posterior tibial artery within the deep compartment, examining accurate needle placement is clinically relevant. In addition, DN has been shown to be a beneficial management strategy for individuals with lower extremity condition; however, the investigators may be able to optimize these beneficial effects by performing DN on the MTrP versus other sites within the same muscle.

If needling directly into the MTrP is more effective than needling away from the MTrP but into the same muscle, it is possible that the improved efficiency could help to optimize management of patients with injury to the ankle/hindfoot with less visits and potentially decreasing health care costs.

Inclusion criteria

• Participants with a previous lower extremity injury occurring to the ankle and/or hindfoot within the previous 12 months AND
• pain greater than 3 out of 10 on the numeric pain rating scale (NPRS) OR
• limited weightbearing dorsiflexion range of motion of greater than 2.0 cm side-to-side difference as measured by the ankle lunge test (ALT) OR
• greater than 3.5% side-to-side difference as assessed by the Y-balance test.

Exclusion criteria

• Operative fixation within the past 3 months to the lower extremity
• Have received DN of the lower extremity within the past 30 days
• Current pregnancy
• Have a history of systemic disorders in which DN would be contraindicated (bleeding disorders or current anticoagulant medication use)
• Immunocompromised
• Decline participation