Estimation of anaerobic threshold, a classical index drawing renewed attention, by new methods without respiratory gas measurements

摘要

Cardiopulmonary exercise testing (CPX) is established as a useful clinical tool for evaluating the severity of heart failure and the limitations of activities of daily life in cardiac patients. Among the several key indices obtained from CPX, a long-accepted gold standard of exercise capacity is the peak oxygen uptake (VCh), a marker of maximal cardiac output. There have been ongoing attempts, however, to develop an evaluation of exercise capacity without requiring maximal effort. The anaerobic threshold (AT) is the first established index of exercise capacity obtained from submaximal exercise testing.