Cardiorespiratory performance of coronary artery disease patients on land versus underwater treadmill tests: a comparative study.

Objective: To compare responses to a cardiopulmonary exercise test on land versus on an underwater treadmill, to assess the cardiorespiratory performance of coronary artery disease patients while immersed in warm water and to compare with the performance of healthy individuals.

Methods: The sample population consisted of 40 subjects, which included 20 coronary artery disease patients aged 63.7±8.