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Related Experiment Videos

Intermuscular coordination in a sprint push-off.

R Jacobs1, G J van Ingen Schenau

  • 1Department of Functional Anatomy, Faculty of Human Movement Sciences, Vrije Universiteit, Amsterdam, The Netherlands.

Journal of Biomechanics
|September 1, 1992
PubMed
Summary
This summary is machine-generated.

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Sprint running shows stereotyped muscle coordination, with a proximo-distal sequence in leg muscles. This pattern balances sprint demands with anatomical constraints, particularly ground reaction forces influencing hamstring and rectus femoris activity.

Area of Science:

  • Biomechanics
  • Human Movement Science
  • Sports Physiology

Background:

  • Movement control often exhibits stereotyped patterns despite inherent indeterminacy.
  • Previous research suggests constraints in transforming joint rotations to desired translations influence movement patterns.
  • The study investigates if sprinting also displays stereotyped intermuscular coordination.

Purpose of the Study:

  • To determine the extent of stereotyped intermuscular coordination in sprinting.
  • To assess if observed coordination patterns can be explained by movement constraints.
  • To identify specific constraints influencing sprint muscle activation.

Main Methods:

  • Seven elite sprinters performed explosive dashes.
  • Electromyography (EMG) of nine leg muscles and ground reaction forces were recorded.

Related Experiment Videos

  • Cinematographic data and linked-segment modeling were used to analyze joint moments and powers.

    • Main Results:

    • Sprint execution demonstrated a stereotyped intermuscular coordination pattern across athletes.
    • A proximo-distal timing sequence was observed in monoarticular muscles.
    • Biarticular muscles (hamstrings, rectus femoris) showed pronounced reciprocal activity, differing from jumping patterns.

    Conclusions:

    • Sprint muscle coordination addresses geometrical and anatomical constraints.
    • Ground reaction force direction is a key constraint explaining reciprocal hamstring and rectus femoris activity.
    • Sprint coordination is a compromise between sprint-specific needs and general movement efficiency principles.