Table 13.

Expected characteristic differences between cycle ergometry and treadmill modalities for CPET testing

	Cycle	Treadmill
Peak oxygen uptake	Lower	Higher
Ability to implement ramp protocol	Easier	Harder
Quantifiable external work	Yes	Based on algorithm
Blood gas collection	Easier	Harder
ECG quality	Higher	Lower
Noise and artefacts	Less	More
Safety	Safer	Increased risk of falls
Weight bearing in obese	Less	More
Degree of leg muscle training	Less	More
Possible use in recumbent position	Yes	No
More appropriate for	Patients	Active normal subjects
Cost	Lower	Higher
Size	Smaller	Larger
Ease of movement	Easier	Harder

Adapted from the American Thoracic Society and American College of Chest Physicians and Mezzani.^{8 90}

CPET, cardiopulmonary exercise testing.