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The Influence of Different Starting Block Distances on Internal Tibial Load in Elite Sprinters
Zilong Lu1, Enze Shao2, Dong Sun1,3
1Faculty of Sports Science, Ningbo University, Ningbo, ZJ, China.
Journal of Applied Biomechanics
|June 10, 2026
Summary
Optimizing sprint start performance with specific starting block distances (SBD) may increase tibial load in elite athletes. This study found gender differences in how SBD affects tibial stress, potentially raising injury risks.
Area of Science:
- Biomechanics
- Sports Science
- Orthopedics
Background:
- Starting block distance (SBD) is crucial for sprint performance.
- Limited research exists on SBD's impact on internal tibial load.
- Understanding tibial loading is vital for injury prevention in sprinters.
Purpose of the Study:
- To investigate the effects of varying front block distances on internal tibial loading in elite sprinters.
- To analyze gender-specific responses to different SBD settings.
- To assess the relationship between SBD and potential injury risks like medial tibial stress syndrome.
Main Methods:
- Finite element analysis (FEA) was used to model tibial loading.
- Internal tibial loading was assessed under three front block distances (50%, 60%, 70% of leg length).
- Data from 28 elite sprinters were analyzed using a 2-way analysis of variance, considering gender and SBD.
Main Results:
- Significant gender-based differences were observed in maximum principal stress, tibial bending moment, maximum shear stress, and total deformation.
- Significant gender-by-SBD interactions were found for maximum principal stress and maximum shear stress.
- Specific SBD settings optimized for performance may lead to increased tibial loading.
Conclusions:
- Elite sprinters exhibit distinct mechanical responses to SBD variations based on gender.
- Current optimal SBD settings may increase internal tibial loading.
- This increased loading could elevate the risk of cumulative injuries, including medial tibial stress syndrome.
