Relationship between Cardiovascular Fitness and Arterial Stiffness, Heart Rate Variability, Quality of Sleep in Middle-aged Male Firefighters. |
Seol-Jung Kang, Gi-Chul Ha, Jae-Ryang Yoon, Kwang-Jun Ko |
Changwon National University Korea National Sport University National Fitness Center |
Correspondence:
Kwang-Jun Ko, Email: tigerkor80@naver.com |
Received: 24 January 2017 • Accepted: 29 April 2017 |
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Abstract |
PURPOSE The aim of this study was the relationship between cardiovascular fitness and arterial stiffness, heart rate variability, and quality of sleep in middle-aged male firefighters. METHODS The subjects were 180 firefighters who were examined for cardiovascular fitness, arterial stiffness, heart rate variability, and sleep quality at the National Fitness Center in 2016.
The maximal oxygen uptake was measured by exercise test. The marker of arterial stiffness was the brachial-ankle pulse wave velocity. The heart rate variability index used time domain analysis and frequency domain. The quality of sleep was assessed by the quality index of the Korean version of Pittsburgh. RESULTS There was a correlation between cardiorespiratory fitness and arterial stiffness(r=-0.292, p<.05). LF/HF in cardiovascular fitness and heart rate variability(r=-0.318, p<.05). However, there was no correlation between cardiorespiratory fitness and sleep quality. CONCLUSIONS These results can be used as a basis for judging the importance of cardiorespiratory fitness enhancement to prevent the risk of cardiovascular disease in firefighters. |
Keywords:
firefighters, cardiovascular fitness, arterial stiffness, heart rate variability, quality of sleep |
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