The forces of ankle joint structures during ergometer cycling.

Area of Science:

• Biomechanics
• Sports Science
• Human Physiology

Background:

• Ergometer cycling is a common exercise and rehabilitation tool.
• Understanding the biomechanics of the ankle joint during cycling is crucial for performance and injury prevention.

Purpose of the Study:

• To quantify ankle joint moments, compressive forces, and Achilles tendon forces during ergometer cycling.
• To investigate how workload and pedal foot position affect these biomechanical parameters.

Main Methods:

• Utilized a quartz force-measuring transducer mounted on the pedal.
• Collected data from six healthy subjects cycling under 11 different conditions (workloads, pedaling rates, saddle heights, foot positions).

Main Results:

• Mean maximum dorsiflexing load moment was 30.9 Nm.
• Mean ankle joint compressive force was 1008 N (1.4x body weight).
• Mean Achilles tendon force was 762 N (1.1x body weight).
• Ankle joint moment significantly varied with workload and pedal foot position.

Conclusions:

• Ergometer cycling imposes substantial forces on the ankle joint and Achilles tendon.
• Workload and pedal foot position are key modulators of ankle biomechanics during cycling.