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Updated: Mar 7, 2026

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Biomechanical performance predictors of the bobsleigh push phase.

Marvin Zedler^1,2, Tobias Alt³, Wolfgang Potthast^1,2

¹Institute of Biomechanics and Orthopaedics, German Sport University Cologne, Cologne, Germany.

Journal of Sports Sciences

|March 6, 2026

Summary

Elite bobsleigh athletes

Keywords:

Random Forest locomotion resisted sprinting sprint acceleration winter sport

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Related Experiment Videos

Last Updated: Mar 7, 2026

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

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Published on: February 5, 2020

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

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Published on: July 26, 2022

An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field

An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field

Published on: May 26, 2020

Area of Science:

Sports Science
Biomechanics
Performance Analysis

Background:

The bobsleigh push phase is critical for overall race performance.
Understanding key performance predictors can optimize training and technique.

Purpose of the Study:

To identify and evaluate the importance of performance predictors in the bobsleigh push phase.
To analyze phase-specific differences in acceleration (start acceleration phase 1, start acceleration phase 2, and acceleration phase).

Main Methods:

Exploratory data analysis using 53 kinematic and kinetic variables from 305 ground contact phases (GC) of 28 male elite bobsleigh athletes.
Random Forest regressor (RF) model to predict average forward acceleration.
Recursive feature elimination for model optimization.

Main Results:

Random Forest models explained significant variance in acceleration (SAP1: 67%, SAP2: 60%, AP: 60%).
Angle of attack was the top predictor across all push phases (IMP: 0.75-1.1), emphasizing whole-body forward orientation.
Hip angular impulse positively correlated with performance in early push phases (IMP: 0.4-0.5), highlighting hip extensor importance.

Conclusions:

Angle of attack and hip angular impulse are key performance predictors in the bobsleigh push phase.
Optimizing whole-body orientation and hip extensor strength can enhance bobsleigh acceleration.