Form and Function: Stronger Toes and Shorter Heels Associate With Better Gait Performance

Area of Science:

• Biomechanics
• Human Locomotion
• Foot Anatomy

Background:

• The human foot's structure is crucial for efficient bipedal walking.
• Economical forward propulsion via foot forces enhances walking speed and endurance.
• The link between specific foot features and walking performance is not well understood.

Purpose of the Study:

• To investigate the association between foot neuromechanical and anthropometric features and walking performance (preferred walking speed and walking endurance).
• To identify specific foot characteristics that influence gait performance in young adults.

Main Methods:

• Assessed neuromechanical features: flexor digitorum brevis muscle activity and thickness, and toe flexor strength.
• Measured anthropometric features: heel length (calcaneus length) and toe length.
• Evaluated walking performance using preferred walking speed and the 6-minute walk test for walking endurance.

Main Results:

• Stronger toe flexors were significantly associated with greater walking endurance (r = .641, P = .010).
• Shorter heel (calcaneus) length was significantly associated with faster preferred walking speed (r = -.527, P = .044).

Conclusions:

• Toe flexor strength enhances walking endurance by improving propulsion capacity.
• Shorter heel length may optimize muscle-tendon mechanics for faster walking.
• These findings suggest potential targets for interventions to improve walking in individuals with gait impairments.