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Relationships between hamstring morphological characteristics and postural balance in elderly men.

Ty B Palmer1, Ahalee C Farrow1, Bailey M Palmer1

  • 1Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX.

Journal of Musculoskeletal & Neuronal Interactions
|March 6, 2020
PubMed
Summary
This summary is machine-generated.

Hamstring muscle quality, not size, is linked to better postural balance in older men when their eyes are closed. This highlights the importance of muscle quality for maintaining stability without visual cues.

Keywords:
Cross-Sectional AreaEcho IntensityFalls RiskUltrasoundVisual Feedback

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Area of Science:

  • Gerontology
  • Biomechanics
  • Musculoskeletal Ultrasound

Background:

  • Postural balance is crucial for older adults' independence and fall prevention.
  • Hamstring muscle morphology (size and quality) is a potential but understudied factor influencing balance.
  • Understanding these links can inform targeted interventions for elderly populations.

Purpose of the Study:

  • To investigate the relationship between hamstring muscle size (cross-sectional area [CSA]) and quality (echo intensity [EI]) and postural balance in elderly men.
  • To differentiate the impact of hamstring morphology on balance with eyes open versus eyes closed.

Main Methods:

  • Nineteen healthy elderly men (mean age 73 years) participated.
  • Hamstring muscle CSA and EI were measured using ultrasound.
  • Postural balance was assessed using a balance testing device measuring the sway index with eyes open and closed.

Main Results:

  • A significant positive correlation was found between hamstring muscle echo intensity (muscle quality) and the sway index with eyes closed (r=0.474, P=0.040).
  • No significant relationships were observed between hamstring CSA (muscle size) and sway index (eyes open or closed).
  • No significant relationship was found between hamstring EI and sway index with eyes open.

Conclusions:

  • Hamstring muscle quality, indicated by lower echo intensity, is associated with better postural balance in older men when visual input is removed.
  • These findings suggest that muscle quality, rather than just size, plays a role in maintaining balance, particularly in challenging sensory conditions.
  • The results may guide the development of exercise programs to enhance postural stability and reduce fall risk in the elderly.