Obesity is a worldwide increasing problem. It is observed in the
medical outdoor that certain people who by definition of obesity
(BMI) are obese but do not have any obesity related medical
diseases. Is there any discrepancy in the obesity of these people
from the others? This review article has tried to answer such
questions.
Obesity is defined as BMI1 >30 kg/m2 or 20 % increase in body
weight than the ideal body weight [1]. Normal BMI is supposed to
be in between 18.5-25 kg/m2. Obesity is also measured by various
other means, skin fold thickness, waist circumference (WC),
waist-to-hip ratio, or by assessing visceral adiposity by imaging
techniques. Obesity is considered as important risk factor besides
other risk factors for various cardiovascular diseases.
Various factors associated with constitutional obesity are
a) Genetic: Associated with genetic mutations, the effect
of mutations on the obesity phenotype being amplified by the
development of obesity producing environment.
b) Racial/ethnic/territorial: Various races/ ethnic and
territorial regions have obesity. One common example is non-
Hispanic Blacks have the highest obesity level, followed by
Hispanics, then non-Hispanic Whites, and lastly non-Hispanic
Asians [2].
c) Gender: Females are at higher risk of developing morbid
obesity than males. This discrepancy is explained partly by
female-specific genetic associations or by stronger effect sizes
of genetic variants in females.
d) High birth weight: Common finding these days. Baby
born with high birth weight possibly have excess fat cells, there
are data available showing early-life influences, beginning with
the intrauterine environment and continuing through the first
few years of life, affect body fatness throughout the life course
[3].
e) Constitutionally obese persons do not have diseases
commonly considered to be associated with obesity e.g.
Hypertension, ischemic Heart disease, diabetes etc. [4].
Pathological/acquired obesity
Obesity which is acquired as a result sedentary life, irregular
dietary habits, lack of exercise, and central obesity due to chronic
mental stress and mental exhaustion. Chronic stress increases
basal sympathetic discharge produces insulin resistance and tooth
pick obesity. This obesity is better measured by waist-hip ratio.
Such obesity increases the risk of hypertension, dyslipidaemia,
and atherosclerosis and type-2 diabetes [5]. It creates a proinflammatory
state, and a pro-thrombotic state; thus leading to
cardiovascular diseases. Constitutional obesity is considered
to grow from infancy which is again sometimes difficult to
differentiate with pathological obesity creating clinical problem for
the physicians that which obese should be treated?
Clinical implications
Constitutional Obesity:
a) Constitutional obesity is different from acquired/
pathological obesity
b) It is difficult to reduce weight in persons with
constitutional obesity and to maintain at lower levels for longer
period is even more difficult.
d) Persons with constitutional obesity have some inherent
protective mechanism which prevents them from various
cardiovascular diseases in absence of other risk factors
e) These people require reassurance only, and no therapy?
Pathological obesity:
a) Pathological obesity carries a definite risk for
cardiovascular and other diseases
b) Pathological obesity must be treated
c) It requires adequate diet and exercise management
d) Most importantly, to reduce central obesity, adequate
mental rest, sound sleep for 7- 8 hours, spending some time in
garden, and practicing some relaxation techniques is important
[6].
All efforts must be done to identify constitutional versus
pathological obesity; as there is a difference in management of both
types. On one hand constitutional obesity requires no special effort;
whereas, on the other hand pathological obesity requires definite
treatment. There should be emphasis to reduce stress/mental
exhaustion in pathological obesity which is the prime reason for
such obesity.