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Related Experiment Videos

Progressive vs single-stage treadmill tests for evaluation of claudication.

A W Gardner1, J S Skinner, B W Cantwell

  • 1Exercise and Sport Research Institute, Arizona State University, Tempe 85287-0404.

Medicine and Science in Sports and Exercise
|April 1, 1991
PubMed
Summary

Progressive treadmill tests offer more reliable assessments of peripheral vascular occlusive disease (PVOD) severity than single-stage tests. Clinical measurements, including claudication pain and hemodynamic data, show higher reliability during progressive testing for better patient evaluation.

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Area of Science:

  • Vascular Medicine
  • Exercise Physiology
  • Diagnostic Testing

Background:

  • Peripheral vascular occlusive disease (PVOD) affects lower limb circulation.
  • Assessing PVOD severity reliably is crucial for patient management.
  • Treadmill tests are commonly used but their reliability varies.

Purpose of the Study:

  • To compare the reliability of single-stage (S) versus progressive (P) treadmill tests.
  • To evaluate the reliability of claudication pain and hemodynamic measurements in PVOD patients.
  • To determine which treadmill protocol better assesses PVOD severity.

Main Methods:

  • Ten stable PVOD patients underwent both S and P treadmill tests bi-monthly for 4 months.
  • Measurements included claudication onset distance, maximal walking distance, foot oxygen tension (TcPO2), ankle systolic blood pressure (SBP), and ankle-to-brachial index (ABI).

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  • Intraclass correlation coefficients (R) assessed the reliability of repeated measurements.

    • Main Results:

    • Progressive (P) tests demonstrated higher reliability for claudication onset distance (R=0.89) and maximal walking distance (R=0.93) compared to single-stage (S) tests (R=0.53, R=0.55).
    • Foot TcPO2 measurements were also more reliable during and after P tests.
    • Ankle SBP and ABI showed high reliability following both test types.

    Conclusions:

    • Progressive treadmill tests provide more reliable clinical measurements for assessing PVOD severity.
    • The enhanced reliability of measurements during progressive testing aids in better patient evaluation and management.
    • Progressive protocols are recommended for more accurate assessment of lower limb hemodynamics in PVOD.