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An algorithm establishing a defined ergometric cardiovascular load

C Wagner1, G Kirchner, V E Kollenbaum

  • 1Fachbereich Informatik & Psychologisches Institut III, Universität Hamburg.

Biomedizinische Technik. Biomedical Engineering
|November 1, 1993
PubMed
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This study introduces a computer-aided ergometric bicycle procedure that precisely controls workload to a target heart rate using an integral controller. The method ensures a linear relationship between workload and heart rate increase, beneficial for cardiac rehabilitation.

Area of Science:

  • Biomedical Engineering
  • Exercise Physiology

Background:

  • Accurate workload regulation is crucial in ergometric testing and rehabilitation.
  • Current methods may lack precision in maintaining target heart rate levels.

Purpose of the Study:

  • To develop and evaluate a computer-aided procedure for precise ergometric workload regulation.
  • To achieve a fixed target heart rate using an integral controller algorithm.

Main Methods:

  • An integral controller algorithm was applied to adjust ergometric bicycle workload.
  • Workload was incrementally adjusted to asymptotically reach a predetermined heart rate.
  • Empirical evaluation involved 27 subjects to assess the procedure's efficacy.

Main Results:

Related Experiment Videos

  • A strictly linear relationship was observed between individual Watt increment and heart rate increase.
  • The median correlation coefficient was found to be 0.95, indicating high accuracy.
  • The procedure demonstrated effective regulation of workload to target heart rate levels.

    • Conclusions:

    • The computer-aided procedure offers a reliable method for ergometric workload regulation.
    • It is recommended for applications like cardiac rehabilitation where heart rate limits are critical.
    • The algorithm's principles can be extended to other physiological regulation tasks, such as blood pressure management.