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Related Experiment Video

Updated: Jul 13, 2026

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study

Published on: November 11, 2022

Interface forces on the seat during a cycling activity.

Chisom Wilson¹, Tamara Reid Bush

¹Department of Mechanical Engineering, 2555 Engineering Building, Michigan State University, East Lansing, MI 48824, USA. wilso637@msu.edu

Clinical Biomechanics (Bristol, Avon)

|August 22, 2007

Summary

Cyclists experience non-traumatic injuries due to seat loading. This study measured vertical and shear forces on bicycle seats, revealing significant loads that may cause groin injuries.

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Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication

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Published on: December 11, 2013

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Last Updated: Jul 13, 2026

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study

Published on: November 11, 2022

Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication

Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication

Published on: December 11, 2013

Area of Science:

Biomechanics
Sports Medicine
Cycling Safety

Background:

Increased interest in non-traumatic bicyclist injuries like groin soreness, skin issues, erectile dysfunction, and impotence.
Combined loading at the bicycle seat is a potential contributing factor to these injuries.

Purpose of the Study:

To investigate the vertical and shear loads experienced at the bicycle seat.
To identify potential biomechanical factors contributing to bicyclist groin injuries.

Main Methods:

Collected vertical and shear load data from 10 cyclists at 75 RPM and 125 watts.
Utilized a multi-axis load cell integrated under the seat for force data collection.
Employed motion analysis and pressure mapping systems to determine force timing and contact regions.

Main Results:

Vertical loads at the seat were greater than shear loads.
Maximum mean vertical loads reached 49-52% body weight.
Significant rearward (11-12% body weight) and lateral (4-5% body weight) shear loads were recorded.

Conclusions:

This study focused on quantifying shear and vertical seat loads.
These measured loads may be significant contributors to groin injuries in cyclists.
Findings provide insight into the biomechanics of cyclist-seat interaction.