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Research of cyclist's spine dynamical model
Julius Griskevicius1, Arturas Linkel1, Jolanta Pauk2
1Vilnius Gediminas Technical University, Vilnius, Lithuania.
Acta of Bioengineering and Biomechanics
|April 9, 2014
Summary
Cyclists experience significant lumbar spine motion, especially in sport positions. Higher speeds and lower tire pressures increase vertebrae rotation and linear variation, potentially leading to disc compression.
Area of Science:
- Biomechanics
- Orthopedics
- Sports Science
Background:
- Cyclist posture significantly impacts lumbar spine loading.
- Understanding spinal dynamics is crucial for injury prevention in cycling.
Purpose of the Study:
- To develop a dynamic biomechanical model of the cyclist's lumbar spine.
- To quantify intervertebral disc motion (linear and angular) in the sagittal plane.
Main Methods:
- A ten degrees of freedom biomechanical model of the spine was numerically solved.
- Simulations analyzed variations in load based on cycling position, tire pressure, road conditions, and speed.
Main Results:
- The L4-L5 vertebrae exhibited the largest linear and angular displacements.
- Sport cycling positions generate higher loads compared to recreational or middle positions.
- Increased speed and lower tire pressure (e.g., 1.5 Bar at 10 km/h vs. 3.5 Bar at 30 km/h) led to greater rotational (0.46° to 3.9°) and linear (0.46 mm to 1.23 mm) variations.
Conclusions:
- The L4-L5 intervertebral disc experiences the most significant motion and potential compression.
- Dynamic spinal modeling provides insights into injury risks associated with cycling parameters.
