Power output measurement during treadmill cycling.

Area of Science:

• Sports Science
• Exercise Physiology
• Biomechanics

Background:

• Cycling performance is often assessed using power output measurements.
• Traditional ergometry systems can be expensive and less accessible.
• Treadmill-based systems offer a potential alternative for cycling assessment.

Purpose of the Study:

• To evaluate the accuracy and reliability of a motorized treadmill as a cycling ergometry system.
• To compare predicted and measured power output during treadmill cycling.
• To determine the validity of using treadmill cycling for assessing cyclist power.

Main Methods:

• Fourteen male cyclists performed repeated cycling trials on a motorized treadmill.
• Bicycles were fitted with mobile ergometers, and speed, gradient, and pulley loading were recorded.
• Estimated power output was calculated and compared with mobile ergometer measurements.

Main Results:

• No significant differences were found between predicted and measured power output during level (257.2 ± 99.3 W vs. 258.2 ± 99.9 W) and graded cycling (268.8 ± 109.8 W vs. 270.1 ± 111.7 W).
• The coefficient of variation for power output measurements ranged from 1.5% to 1.8%, indicating high reliability.
• The system demonstrated acceptable accuracy for assessing power output.

Conclusions:

• Motorized treadmill cycling is a valid and reliable ergometry system for assessing cyclist power output.
• This method provides accurate measurements comparable to traditional ergometers.
• Treadmill cycling presents a practical alternative for performance evaluation in cyclists.