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Related Experiment Videos

Self-release of ski-binding.

S Werner1, K Willis

  • 1Section Sports Medicine, Department Surgical Science, Karolinska Institutet, Stockholm, Sweden. werner.eriksson@telia.com

International Journal of Sports Medicine
|October 29, 2002
PubMed
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Most downhill skiers can self-release ski bindings with a foot twist, but weaker individuals and children may struggle. Thigh muscle strength significantly impacts this crucial binding release ability.

Area of Science:

  • Sports Medicine
  • Biomechanics
  • Orthopedics

Background:

  • Ski binding self-release is a critical safety feature for downhill skiers.
  • Understanding the biomechanical factors influencing self-release is essential for injury prevention.

Purpose of the Study:

  • To assess the ability of downhill skiers to self-release ski bindings via an inward foot and leg twist.
  • To investigate the correlation between thigh muscle torques and successful binding self-release.

Main Methods:

  • Twenty-five skiers (ages 11-63) performed a self-release test using standardized equipment.
  • Thigh muscle torques (quadriceps and hamstrings) were measured isokinetically.
  • Electromyography (EMG) analyzed muscle engagement during the release maneuver.

Related Experiment Videos

Main Results:

  • Nineteen out of twenty-five skiers successfully self-released the binding.
  • Four children and two skiers with lower muscle strength were unable to release the binding.
  • Medial hamstrings showed the highest muscle activity during the release; significant correlation found between thigh muscle torques and release ability.

Conclusions:

  • Downhill ski binding self-release is achievable for most skiers but is dependent on adequate thigh muscle strength.
  • Muscle weakness and younger age may be risk factors for inability to self-release bindings.
  • Assessing thigh muscle strength could be relevant for evaluating a skier's ability to perform this safety maneuver.