Related Experiment Videos
Optimum take-off techniques and muscle design for long jump
A Seyfarth1, R Blickhan, J L Van Leeuwen
1Institute for Sport Science, LSB Biomechanik, Friedrich-Schiller-University, Seidelstrasse 20, D-07749 Jena, Germany.
The Journal of Experimental Biology
|January 29, 2000
Summary
Eccentric force enhancement in leg extensor muscles is crucial for long jump performance. Muscle strength and this enhancement significantly boost jumping ability, more than tendon properties or speed.
Area of Science:
- Biomechanics
- Human Movement Science
Background:
- Investigating knee extensor muscle action during long jumps requires advanced models.
- Realistic muscle and tendon properties are essential to understand eccentric force enhancement and non-linear tendon behavior.
Purpose of the Study:
- To model knee extensor muscle action during long jumps using a two-segment model.
- To demonstrate the benefits of eccentric force enhancement and non-linear tendon properties in athletic performance.
Main Methods:
- Utilized a two-segment biomechanical model based on Alexander (1990).
- Incorporated realistic muscle and tendon properties to simulate the take-off phase of long jumps.
Main Results:
- Highly stretched leg extensor muscles generate vertical momentum during take-off.
- Eccentric force enhancement and muscle strength significantly influenced jumping performance.
- Jumping performance was insensitive to variations in tendon compliance and muscle speed.
Conclusions:
- Eccentric force enhancement and muscle strength are key determinants of long jump performance.
- Optimal jumping technique is largely independent of approach speed and specific muscle properties.
- Muscle properties impose constraints on the take-off velocity vector angle.