Association of estimated cardiorespiratory fitness in middle-aged and elderly people with cardiovascular disease: evidence from the China Health and Retirement Longitudinal Study

Cardiovascular diseases (CVD) is a major threat to public health, while cardiorespiratory fitness (CRF) is a key predictor of chronic disease. Given this, the purpose of this study was to investigate the relationship between estimated CRF (eCRF) and CVD in middle-aged and elderly Chinese people.