What is the maximum heel lift that can be accommodated inside a shoe?

The maximum heel lift that can typically be accommodated inside a shoe is 6.35 mm. This limit is often guided by ergonomic and biomechanical principles that aim to maintain foot stability and comfort while avoiding undue strain on the muscles and joints. A heel lift of this amount provides enough elevation to assist with conditions such as leg length discrepancies or Achilles tendon issues while still allowing for a reasonable walking gait and weight distribution.

In the context of designing or modifying footwear, exceeding this limit can lead to altered biomechanics, increased risk of injury, and discomfort. A lift greater than this may require additional adjustments to the overall shoe structure and can affect balance and movement patterns. This makes 6.35 mm a practical limit for most footwear applications to ensure effective support without compromising function.