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Catapult effect in pole vaulting: is muscle coordination determinant?
Julien Frère1, Beat Göpfert, François Hug
1Laboratoire Motricité, Interactions, Performance (MIP) (EA 4334), University of Nantes, F-44300 Nantes, France. julien_frere@hotmail.com
Summary
Pole vaulting height is not significantly influenced by muscle coordination during the straightened pole phase. Athletes utilize varied muscle groupings activated similarly to achieve maximum height.
Area of Science:
- Biomechanics
- Sports Science
- Human Movement
Background:
- The catapult effect in pole vaulting is crucial for maximizing height.
- Understanding muscle coordination during the critical phase from straightened pole to maximum height is key.
- Previous research has not fully elucidated the role of muscle synergies in this phase.
Purpose of the Study:
- To determine the influence of the catapult effect on maximum vaulting height (HP).
- To analyze muscle coordination patterns using surface electromyography (sEMG) during the critical vaulting phase.
- To investigate the relationship between push-off index and muscle synergies.
Main Methods:
- Seven experienced pole vaulters performed vaults recorded via video analysis.
- Surface electromyography (sEMG) captured activity from 10 upper limb muscles.
- Non-negative matrix factorization identified muscle synergies from sEMG data.
Main Results:
- Estimated maximum height (HP(est)) was not significantly different from actual maximum height (HP).
- Two dominant muscle synergies explained over 96% of muscle activity variance across all athletes.
- While synergy activation patterns were consistent, the specific muscle synergy vectors showed high inter-individual variability.
Conclusions:
- Muscle coordination strategies between the straightened pole and maximum height phases have minimal impact on overall pole vaulting performance.
- Pole vaulters employ diverse muscle groupings activated in a similar manner to achieve consistent performance outcomes.
- The study highlights the adaptability of muscle synergies in achieving a common biomechanical goal.
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