University of Wollongong
Browse

Cardiovascular regulation during passive cycle exercise in trained and untrained males

Download (9.51 MB)
thesis
posted on 2024-11-11, 11:52 authored by Yati Nurhayati
Cardiovascular responses of trained male Cyclists (20.30 ±1.11 years; n=10), trained Runners (26.20 ±1.10 years; n=10), and fit but untrained Controls (22.00 ±0.75 years; n=10) were examined at supine and upright rest, and during passive cycle exercise. Mean maximal aerobic power of Cyclists (76.25 ±1.44 ml.kg-1.min-1) and Runners (65.50 ±2.16 ml.kg-1.min-1 was significantly higher (p<0.05) than that of Controls (46.31 ±2.36 ml.kg -1.min-1. Resting heart rate of Cyclists (58.43 ±2.69 b.min-1), Runners (57.21 ±3.47 b.min-1, and Controls (65.38 ±2.93 b.min-1) was not significantly different (p>0.05). Impedance cardiography was used to examine the response of heart rate, stroke volume, cardiac output, contractility of the heart, and arteriolar resistance, during passive cycle exercise at three different intensities (30 rpm, 60 rpm, and 80 rpm). Blood pressure and rate pressure product were measured throughout exercise. The vagal influence on the heart was assessed through time series analysis of heart rate variability at low (0.07-0.11 Hz) and high frequencies (0.12-0.40 Hz). Electromyography was used to ensure that passively moved muscles did not contract. Cardiovascular response was compared for all subjects combined and between the three groups (Cyclists, Runners, and Controls).

History

Year

1996

Thesis type

  • Masters thesis

Faculty/School

Department of Biomedical Science

Language

English

Disclaimer

Unless otherwise indicated, the views expressed in this thesis are those of the author and do not necessarily represent the views of the University of Wollongong.

Usage metrics

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC