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Background: Sedentary life style leads to autonomic
dysfunction with sympathetic hyperactivity which leads to increased morbidity.
Objective: This study was aimed to investigate the
relationship of autonomic function tests with age, sex and anthropometric
measurements in sedentary workers.
Methods: This study was conducted on 50 healthy
sedentary office workers aged between 20 to 50 years. Their anthropometric and
parameters of body composition were calculated. Autonomic functions were
assessed by recording of frequency domain parameters of heart rate variability
(HRV).
Results: Among the HRV parameters, the mean LF, HF
LF/HF ratio and total power was 453 ± 428 ms2, 406 ± 612 ms2, 2.15 ± 2.64 and 1432 ± 1238
ms2, respectively. There was no significant difference in HRV
parameters of male and female subjects (P>0.05). HF, LF and LF/HF ratio
decreased significantly with age (r=-0.422; p=0.032). No significant
correlation was found between HRV parameters and anthropometric parameters
(p>0.05). Among the parameters of body composition, specifically in case of
fat free mass the LF/HF ratio was significantly increased (r=0.582, p=0.001).
Conclusion: Ageing process causes a decrease in HRV. As
the weight increases, LF/HF ratio increases indicating increased sympathetic activity.
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