Leg length inequality. Implications for running injury prevention

Area of Science:

• Musculoskeletal health
• Biomechanics
• Sports medicine

Background:

• Leg length inequality is a common musculoskeletal malalignment.
• It is associated with structural, postural, and environmental factors.
• This inequality can alter mechanical stress distribution, potentially leading to overuse injuries.

Purpose of the Study:

• To explore the link between leg length inequality and running injuries.
• To evaluate the scientific basis for using in-shoe lifts to address this inequality.
• To highlight the need for further research into biomechanical effects.

Main Methods:

• Literature review on leg length inequality and running injuries.
• Analysis of biomechanical principles related to altered stress distribution.
• Identification of research gaps regarding interventions.

Main Results:

• Leg length inequality is a plausible cause of various overuse injuries in runners.
• Specific injuries linked include stress fractures, low back pain, hip pain, and vertebral disk issues.
• The efficacy of in-shoe lifts for correcting leg length inequality has not been rigorously assessed.

Conclusions:

• Leg length inequality is a significant factor in running-related overuse injuries.
• Further research is essential to quantify the biomechanical impact of this condition.
• The effectiveness of interventions like in-shoe lifts needs robust scientific evaluation.