Exercise based evaluation of cardiac function improvement

Heart rate, Blood Pressure and Rate pressure product are important physiological parameters that can be utilized to analyze the physical condition of the human body. However, the step-by-step analysis on the changes of ECG waveforms and RPP before and after regular exercise has been presenting in this paper. This proposed work examines the Changes of ECG waveforms after regular exercise. Rate pressure product results can be calculated based on HR and SBP after 12-minute running exercise in three weeks with the 10 healthy subjects. In these study determines the regular three weeks of exercise changes the recovery of HR which is the main evolution parameter of the cardiovascular fitness. RPP is an important indicator of the ventricular function. HR, SBP and RPP increases with strenuous exercise which provide the adequate blood supply to the myocardium. Thus, according to Brody effect, amplitude of R-peak in ECG at rest increased, will most likely is caused by the LV volume increased with improvement of heart function. In this experiment measurement of amplitude features of ECG like RQ, SQ, and TQ which represent the difference of amplitude between R-, S-, T-, and Qwave respectively. After the final results showed that the 100% of subject’s HR at rest condition has continuously decreased and 100% of R peak amplitude at rest increased during the three weeks of experiment. Moreover, RQ/SQ/HR and TQ/RQ/HR at rest 80% and 90% decreased during the experiment duration respectively; while, 70% of RQ/SQ/HR decreased, 50% of TQ/RQ/HR increased immediately after exercise and also 100% of RPP at rest decreased which indicating increased MVO2 at rest. According to the Variation of these parameters, it indicated that cardiac function enhanced. Keywords—ECG; SBP; RPP; Amplitude features; Brody effect; LV volume; 12-minute running; MVO2