Complexity assessment of ECG RR interval

Physical load is very important and necessary for human organism and for its systems functionality. During bicycle ergometry work we can evaluate the functionality of the human organism. We looked for the complexity measure, which could integrally and simple evaluate organism reaction to physical load. We used ECG RR interval allometric relation and RR interval information dimension. We indicated, that the slope of ECG RR interval allometric relation and information dimension could be used as the RR interval complexity measures, defining all organism reaction to physical load. The study showed that young women RR interval complexity is higher, it means that all organism adaptation to physical load is better, different organism systems better interact together. Significant differences between load and recovery periods detected different adaptation complexity levels.