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Related Experiment Videos

Fall arrest strategy affects peak hand impact force in a forward fall.

K M DeGoede1, J A Ashton-Miller

  • 1Department of Mechanical Engineering, G.G. Brown 3208, University of Michigan, Ann Arbor, MI 49109-2125, USA.

Journal of Biomechanics
|May 22, 2002
PubMed
Summary

Individuals can consciously reduce peak impact forces during falls by altering their fall arrest strategy. This finding suggests that fall arrest techniques may influence wrist injury risk, regardless of bone strength.

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Area of Science:

  • Biomechanics
  • Human Kinetics
  • Injury Prevention

Background:

  • Forward falls pose a risk of wrist and forearm injuries.
  • Understanding impact forces during fall arrest is crucial for injury mitigation.

Purpose of the Study:

  • To investigate how different fall arrest strategies affect peak hand impact forces.
  • To determine if volitional control can reduce impact forces during a simulated fall.

Main Methods:

  • Five healthy males simulated a 1-m forward fall.
  • Measurements included body kinematics, ground reaction forces, and upper-extremity electromyography (EMG).
  • Subjects were instructed with three different fall arrest strategies.

Main Results:

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  • Subjects reduced peak wrist impact force by 27% (natural landing) and 40% (stiff-arm landing).
  • Peak forces ranged from 0.65 to 1.7 body weight.
  • Impact force correlated with elbow angle, wrist velocity, and pre-impact triceps EMG activity.

    • Conclusions:

    • Fall arrest strategy significantly alters peak impact forces on the distal forearm.
    • Volitional control over fall arrest can reduce injury risk.
    • Fall arrest strategy influences wrist injury risk independently of bone strength.