The Mathematical Analysis of Heart Rate Response Curve During Treadmill Exercise and Its Application

In this paper,the dynamic change of heart rate was used to study its whole response on physical load by means of mathematical method and to evaluate the response capacity of the cardiovascular system.11 subjects (6 young physical workers and 5 middle aged mental workers) were selected for the treadmill tests under three diferent loads (submaximal,medium and light) and two different physiological functional states (before and after 20 days bed rest).By means of least square method,optimal fitting expressions of heart rate response curve were established during exercise and recovery peroid respectively.Through the study of different load and different physiological functional states,physiological meaning of each parameter in equations was established.Five independent parameters were obtained,they were selected as indicators for evaluation of the response capacity of cardiovaslular system under exercise loading and can be used to differentiate three different loads and two different physiological functional states.This study provided the scientific basis for the selection of candidates and medical monitoring as well as for the study of response characteristic of the cardiovaslular system.