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Related Experiment Video

Updated: Feb 14, 2026

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Development and Validation of the Low Sit-High Step Test for Assessing Lower-Extremity Function in Sarcopenia.

Serpil Demir1, Burak Elçin1, Ramazan Mert1

  • 1Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Akdeniz University, Antalya 07070, Turkey.

Diagnostics (Basel, Switzerland)
|February 13, 2026
PubMed
Summary

The Low Sit-High Step (LS-HS) Test effectively assesses lower-extremity function and detects early sarcopenia. This reliable and valid tool aids in monitoring functional decline in clinical practice.

Keywords:
geriatric assessmentlow sit–high step testlower extremitymuscle strengthphysical performancesarcopenia

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Area of Science:

  • Gerontology
  • Kinesiology
  • Biomedical Engineering

Background:

  • Sarcopenia, characterized by muscle mass and strength loss, poses a significant health risk, particularly in older adults.
  • Early detection of sarcopenia is crucial for timely intervention and management.
  • Existing assessment tools may lack cost-effectiveness, clinical practicality, or sensitivity for early-stage detection.

Purpose of the Study:

  • To evaluate the validity, reliability, and diagnostic accuracy of the novel Low Sit-High Step (LS-HS) Test.
  • To assess the LS-HS Test's sensitivity in identifying early-stage sarcopenia and functional decline.
  • To establish the LS-HS Test as a cost-effective and clinically practical tool for lower-extremity assessment.

Main Methods:

  • A cross-sectional study involving 205 participants across four groups: probable sarcopenia, sarcopenia, young controls, and middle-to-older adult controls.
  • Comparison of LS-HS Test scores with standard assessments for lower-extremity function.
  • Reliability analysis using Cronbach's alpha and Intraclass Correlation Coefficient (ICC).
  • Multinomial logistic regression and Receiver Operating Characteristic (ROC) curve analysis for predictive power and diagnostic accuracy.

Main Results:

  • LS-HS Test scores were significantly higher in individuals with probable sarcopenia and sarcopenia (p<0.05).
  • LS-HS performance was a significant predictor of both probable sarcopenia and sarcopenia (p<0.001).
  • The test demonstrated excellent internal consistency (Cronbach's α = 0.938) and very high reliability (ICC = 0.998).
  • ROC analysis showed high diagnostic accuracy for probable sarcopenia (AUC = 0.768) and sarcopenia (AUC = 0.704).

Conclusions:

  • The LS-HS Test is a valid, reliable, and sensitive measure of lower-extremity functional capacity.
  • It effectively identifies early functional decline associated with the sarcopenia spectrum.
  • The LS-HS Test serves as a practical and effective alternative for routine clinical assessment and sarcopenia monitoring.