Autonomic Reactivity Differs in Young Adults Classified using Revised Indian and WHO Guidelines for Obesity
Introduction: Many studies have reported alteration in autonomic activity in obesity. However, there is paucity of literature comparing autonomic reactivity using different guidelines of obesity. As Indian guidelines were revised recently and WHO states that countries should use all categories o...
Main Authors: | , , |
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Format: | Article |
Language: | English |
Published: |
JCDR Research and Publications Private Limited
2016-09-01
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Series: | Journal of Clinical and Diagnostic Research |
Subjects: | |
Online Access: | https://jcdr.net/articles/PDF/8420/20611_CE(RA1)_F(T)_PF1(ROAK)_PFA(AK)_PF2(PAG).pdf |
Summary: | Introduction: Many studies have reported alteration in autonomic
activity in obesity. However, there is paucity of literature comparing
autonomic reactivity using different guidelines of obesity. As Indian
guidelines were revised recently and WHO states that countries
should use all categories of BMI for reporting purposes, it is prudent
to compare physiological state in different categories of BMI.
Aim: The aim of the present study was to compare the autonomic
alteration in young adults using revised Indian and WHO guidelines for obesity.
Materials and Methods: A battery of autonomic tests (Valsalva
Manoeuvre (VM), Deep Breathing Test (DBT), Lying to Standing
Test (LST) and Hand Grip isometric exercise Test (HGT) was
conducted on 34 overweight and obese and 30 normal weight
volunteers categorised using revised Indian guidelines of body
mass index. Same participants were regrouped and analysed
using WHO guidelines of BMI and waist hip ratio (WHR).
Results: For analysis, participants were grouped into 3 categories
of normal, overweight and obese using revised Indian guidelines
for obesity. Same participants were regrouped according to WHO
guidelines. E:I ratio during DBT, 30:15 ratio during LST, Valsalva
ratio during VM and increase in DBP during HGT were compared
in different subgroups. There was no difference in sympathetic
and parasympathetic activities in participants classified
according to revised Indian guidelines. In participants classified
using WHO criteria, sympathetic reactivity in overweight subjects
was significantly less as compared to normal subjects (p<0.05).
Conclusion: Autonomic alterations might be more related to
body fat percent rather than BMI. Indian guidelines are based on
the observation that Asian population has more adipose tissue
in WHO range of BMI. As the guidelines of BMI are applicable to
all age groups and do not consider physical activity profile, they
might still not be a good predictor of body fat. |
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ISSN: | 2249-782X 0973-709X |