Evaluation of the effect of whole-body cryotherapy on the circulatory system in patients with ankylosing spondylitis by analysis of duration and QT interval dispersion

Leszek Jagodziński, Agata Stanek, Joanna Gmyrek, Grzegorz Cieślar, Andrzej Sielańczyk, Aleksander Sieroń

Leszek Jagodziński, Agata Stanek, Joanna Gmyrek, Grzegorz Cieślar, Andrzej Sielańczyk, Aleksander Sieroń – Evaluation of the effect of whole-body cryotherapy on the circulatory system in patients with ankylosing spondylitis by analysis of duration and QT interval dispersion. Fizjoterapia Polska 2007; 7(3); 362-369

Abstract
Background. The aim of this study was to estimate the influence of whole-body cryotherapy on some selected parameters of the circulatory system. Material and methods. The investigation involved 7 male patients with ankylosing spondylitis. They were exposed to a cycle of 10 everyday 2 minute-lasting procedures of whole-body cryotherapy at a temperature of -130°C which was followed by subsequent kinesitherapy. Patients treated with drugs influencing the circulatory system and suffering from circulation and hormonal system disorders were excluded. During the day preceding the beginning of cryotherapy procedures and once more, after finishing whole-body cryotherapy cycle, echocardiography with calculation of left ventricle ejection fraction (LVET), record and analysis of heart rate variability (HRV), late ventricular potentials and QT dispersion were made. Results. No significant differences between ejection fraction, late ventricular potentials, QT dispersion values before and after the end of cryotherapy cycle were found. Whole-body cryotherapy evoked increase in total heart rate variability, which was statistically significant for most of the parameters in time analysis. Spectrum analysis showed statistically insignificant increase in spectrum power in the full range of analyzed frequencies. Conclusions. Long-lasting whole-body cryotherapy does not influence ejection fraction, late ventricular potentials and QT dispersion in patients without significant pathology of circulation. Cryogenic temperatures applied on the whole-body exerts beneficial influence of whole-body cryotherapy on adaptive processes of vegetative nervous system.
Key words:
whole-body cryotherapy, circulation system, ejection fraction, heart rate variability, late ventricular potentials, QT dispersion
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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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