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[Bicycle ergometry exercise tests: a comparison between 3 protocols with an increasing load].

P Carta1, G Aru, M T Barbieri

  • 1Istituto di Medicina del Lavoro, Università di Cagliari.

La Medicina Del Lavoro
|January 1, 1991
PubMed
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Comparing exercise test protocols, the 30 Watts/3 min and 10 Watts/1 min tests show similar results for maximal oxygen uptake and anaerobic threshold in runners. However, the 30 Watts/1 min test yielded higher exhaustion workloads.

Area of Science:

  • Exercise Physiology
  • Sports Science
  • Cardiorespiratory Fitness

Background:

  • Accurate assessment of exercise physiology is crucial for training and performance evaluation in athletes.
  • Different incremental exercise testing protocols exist, but their comparability in determining key physiological markers like anaerobic threshold and maximal oxygen uptake is not fully established.
  • Understanding protocol-specific responses is essential for consistent and reliable physiological data collection.

Purpose of the Study:

  • To compare the validity and comparability of three different incremental cycle ergometer test protocols in assessing physiological responses in male long-distance runners.
  • To determine if different exercise test protocols influence the determination of anaerobic threshold (AT) and maximal oxygen uptake (VO2 max).
  • To evaluate the impact of varying workload increments and stage durations on cardiorespiratory and metabolic measurements.

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Main Methods:

  • Twenty-six male long-distance runners completed three incremental cycle ergometer tests to exhaustion on separate days.
  • Test protocols varied in workload increment and stage duration: Test I (30 Watts/3 min), Test II (10 Watts/1 min), and Test III (30 Watts/1 min).
  • Continuous ECG monitoring and intermittent ventilatory and gas exchange measurements (VE, VCO2, VO2) were recorded, with AT determined using established indices.

Main Results:

  • Maximal oxygen uptake (VO2 max) and oxygen uptake at anaerobic threshold (VO2 at AT) were comparable across all three protocols.
  • Workload at exhaustion and power output at AT were similar between Test I (30W/3min) and Test II (10W/1min), but significantly higher in Test III (30W/1min).
  • Slopes of cardiorespiratory variables against workload were similar for Tests I and II, but steeper for Test III, indicating different physiological strain patterns.

Conclusions:

  • The 30 Watts/3 min and 10 Watts/1 min cycle ergometer tests demonstrate good comparability for assessing key physiological parameters in runners.
  • The 30 Watts/1 min protocol may overestimate exhaustion workload and AT power output compared to the other two protocols.
  • For workloads below AT, longer stage durations (3 min) allow for attainment of a physiological steady state, whereas shorter durations (1 min) may lead to underestimation of cardiorespiratory variables.