A bicycle ergometer for high altitude investigations

Area of Science:

• Exercise Physiology
• Biomedical Engineering
• Altitude Research

Background:

• Standard bicycle ergometers are often bulky and difficult to transport to remote or high-altitude locations.
• Investigating exercise physiology at high altitudes requires reliable equipment for controlled workload assessment.

Purpose of the Study:

• To adapt a standard Monark bicycle ergometer for portability to high altitudes.
• To validate the functional equivalence of the modified ergometer compared to the standard model.

Main Methods:

• A Monark bicycle ergometer was machined into 12 pieces for backpack transport.
• Reassembly, calibration, and functional testing were performed.
• 18 subjects performed standardized workloads (300, 600, 900 kpm) at 50 rpm on both ergometer types, with heart rate and oxygen uptake measured.

Main Results:

• No significant differences in heart rate or oxygen uptake were observed between the standard and modified ergometers.
• The modified ergometer demonstrated consistent performance across all tested workloads.

Conclusions:

• The adapted, portable bicycle ergometer is a viable tool for high-altitude research.
• The modifications did not compromise the ergometer's ability to provide controlled workloads for physiological measurements.