Effects of Peroneus Brevis versus Peroneus Longus Muscle Training on Muscle Function in Chronic Ankle Instability: A...

Area of Science:

• Sports Medicine
• Rehabilitation Science
• Orthopedics

Background:

• Chronic ankle instability (CAI) is a prevalent condition often resulting from ligamentous injuries.
• Rehabilitation for CAI commonly emphasizes peroneus muscle strengthening, yet specific peroneus longus muscle training is under-researched.
• Targeted strengthening of the peroneus longus and brevis muscles may offer improved outcomes for CAI patients.

Purpose of the Study:

• To investigate the effects of home-based peroneus longus training (PLT) and peroneus brevis training (PBT) on CAI symptoms and function.
• To compare the efficacy of PLT versus PBT in improving ankle strength, stability, and functional outcomes.
• To evaluate the potential of specific peroneus muscle strengthening for CAI rehabilitation.

Main Methods:

• A 12-week, double-blind, randomized controlled trial involving 52 adult males with CAI.
• Participants were assigned to either PLT or PBT, utilizing home-based exercises with mobile monitoring.
• Outcome measures included Foot and Ankle Outcome Scores (FAOS), isokinetic ankle strength, and Y-balance tests, assessed pre- and post-intervention.

Main Results:

• Both PLT and PBT groups demonstrated significant improvements in FAOS, inversion, and eversion strength at 30°/s and 120°/s.
• Both training protocols led to significant improvements in the anterior and posterolateral directions of the Y-balance test.
• PLT showed a statistically greater improvement in eversion muscle strength and power, as well as enhanced performance in the Y-balance test compared to PBT.

Conclusions:

• Both peroneus longus training (PLT) and peroneus brevis training (PBT) are effective interventions for patients with chronic ankle instability (CAI).
• PLT demonstrates a superior potential in enhancing ankle eversion strength, muscle power, and balance compared to PBT.
• Targeted PLT may be a valuable addition to rehabilitation programs for individuals suffering from CAI, potentially leading to better functional recovery.