According
to The Old Farmer's Almanac 2000, a waist measurement
of 35 inches or more
in women and 41 inches
or more in men—regardless
of height—suggests a serious risk of weightrelated
health problems.
Very muscular people
often have a higher
bodymass index because muscle
weighs more than fat.
One simple healthrisk test is to pinch
your side just above your waist. If you can
pinch more than an inch,
you are at risk of weightrelated health problems. 

The
amount of skin may
be found using the formula:
where height is in centimeters
and weight is in kilograms. The result obtained is surface
area measured in square meters. Weight is approximately
proportional to height times height times height (i.e.
your height cubed).
Bodymass index is essentially
a ratio of volume to surface
area. The solid geometric figure with the greatest
ratio of volume to surface area is the sphere. 