Evaluation of circulatory system adaptation based on Heart Rate Variability in 40-58 years old females

Małgorzata Fortuna, Jacek Szczurowski, Anna Kołcz-Trzęsicka

Małgorzata Fortuna, Jacek Szczurowski, Anna Kołcz-Trzęsicka – Evaluation of circulatory system adaptation based on Heart Rate Variability in 40-58 years old females. Fizjoterapia Polska 2011; 11(4); 375-380

Abstract
Background. HRV is the measure of circulatory system adaptation in aerobic training. The goal of the study was to evaluate the effect of aerobic training on sinus rhythm variability. Material and methods. 60 minute long exercise was applied twice a week within 12 weeks. The mean heart rate (HR) value during exercise oscillated around 130 beats per minute (bpm). The subjects performed work at the level of aerobic metabolism mode to improve their aerobic fitness and decrease their BMIs. The studied group comprised 11 non smoker females aged 40-58 years. The subjects were either overweight or obese and they were not affected by any diseases. HRV analysis was based on HR, LF% and LF/HF ratio. All the results were based on the analysis using Power Spectrum program. The subjects had their HR recorded using Polar RS 800 Sport Tester with signal record option. BMI was measured before and after the training cycle. The results were statistically analysed. Results. Analysis of the obtained results indicates lack of significant differences in changes pertaining to the autonomic nervous system and resting HR values on application of the training cycle in the study subjects. A significant decrease in the BMI index was noted. Conclusions. HRV may be used as a measure of circulatory system adaptation during physical training. A three months long training cycle with 60-minute exercise performed twice a week did not result in adaptive changes within the autonomic nervous system or resting HR values in the studied sample. The training resulted in BMI index decrease.
Key words:
heart rate variability, adaptation, Cardiovascular System
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