ABSTRACT
Heart rate is the most common index to directly monitor the level of physical stress by comparing the subject's heart rate with an appropriate "target heart rate" during exercise. However, heart rate only reveals the cardiac rhythm of the complex cardiovascular changes that take place during exercise. It is essential to get the dynamic response of the heart to exercise with various indices instead of only one single measurement. Based on the rest-workload alternating pattern, this paper screens the sensitive indices of exercise load from electrocardiogram (ECG) rhythm and waveform, including 4 time domain indices and 4 frequency domain indices of heart rate variability (HRV), 3 indices of waveform similarity and 2 indices of high frequency noise. In conclusion, RR interval (heart rate) is a reliable index for the realtime monitoring of exercise intensity, which has strong linear correlation with load intensity. The ECG waveform similarity and HRV indices are useful for the evaluation of exercise load.
Subject(s)
Humans , Electrocardiography , Exercise , Heart Rate , Monitoring, Physiologic , WorkloadABSTRACT
Objective To explore the effect of infrared ray treatment on improving fat granules survival rate and reducing postoperative complications in autologous fat transplantation. Methods The patients who received autologous fat transplantation were divided into infrared ray group and control group.Each group was further divided into breast group and face group. These cases in infrared ray group were radiated for 30 minutes with infrared ray 24 hours later after surgery, once a day for sequential 5 days.No treatment was given to the control group. The survival status and complication were observed and statistically analyzed. Results Infrared ray treatment could increase fat granules survival rate after autologous fat transplantation, but no significant effect was acheived on reducing complications. Conclusion Infrared ray treatment is an effective way to enhance the survival rate of fat granules.