Describing force-patterns: a method for an analytic classification using the example of sledge jumps.

Area of Science:

• Biomechanics
• Movement Analysis
• Applied Mathematics

Background:

• Accurate classification of human movement patterns is crucial for various fields.
• Existing methods for classifying movement patterns based on contact forces are limited.
• Identifying distinct reaction-force patterns during locomotion tasks is an ongoing challenge.

Purpose of the Study:

• To develop and evaluate a novel method for classifying movement patterns using contact forces.
• To categorize reaction-forces during hopping in a sledge system into four distinct types.
• To enable precise determination of these movement pattern types.

Main Methods:

• Utilized a sledge system to measure contact forces during hopping.
• Developed a method to approximate four identified reaction-force types (symmetric single-modal, positive mono-modal, negative mono-modal, multi-modal with plateau) using mathematical functions.
• Applied discriminant analysis to function coefficients derived from measured reaction-forces.

Main Results:

• Identified four major types of reaction-forces during hopping in a sledge system.
• Successfully reproduced measured reaction-forces using specific mathematical functions and coefficients.
• Achieved classification of force patterns into the four types using a three-dimensional function-coefficient derived from discriminant analysis.

Conclusions:

• The developed method enables accurate classification of movement patterns based on contact forces.
• The approach provides a robust tool for movement analysts to categorize force patterns into predefined types.
• This advancement offers a more precise determination of movement dynamics during hopping tasks.