The
ratio of fat to lean body mass is a greater determinant of health than body
weight.
Do
you know someone who can eat whatever he or she wants without ever gaining an
ounce? No need to be envious anymore, because science says body composition—the
ratio of fat to lean body mass—is a greater determinant of health than just
plain body weight.
Normal-weight
obesity, also known as “skinny fat,” is a growing problem in the United States.
These terms describe a person’s body composition that is high in fatty tissue
in comparison to lean tissue, while still within normal limits of the body mass
index (BMI). Those who are considered to be “skinny fat” do not appear to be
overweight; however, they have a high percent body fat, especially visceral
fat—the fat that surrounds vital organs.
A
major problem for these folks is that they often are misclassified as healthy
when they actually could be at high risk for chronic disease. The fact is
that “skinny” is not at all synonymous with “fit and healthy”. In the same
manner that muscular athletes can still have optimal body composition while
technically being in the overweight BMI category, people who appear to be thin
can actually have high levels of body fat. Think of sumo wrestlers who can
weigh upwards of 300 pounds—it is possible that they are more fit and healthy
than the thin spectators who have a higher fat-to-muscle ratio.
A
recent study showed that percent body fat was inversely related to
cardiorespiratory fitness (CRF)—a strong predictor of cardiovascular disease
and premature death (1). Subjects that had larger amounts of body fat
were found to be less fit, independent of body weight or stature.
Numerous
studies show similar trends between body fat and risk of chronic disease and
mortality. While much focus has been on how increased body weight can lead to a
greater risk of disease, little emphasis has been on the health risks
associated with being underweight and unfit.
In
a study that reviewed the relationship between cancer mortality and various
adiposity (obesity) measures as well as fitness (quantified as the duration of
maximal treadmill exercise test), researchers found that unfit, underweight
subjects were at a higher risk of mortality than the obese, fit subjects (2). These
results suggest that, in addition to weight management, physical activity
should be emphasized as a critical part of a healthy lifestyle and disease
prevention.
“Good
health is more than a BMI or a number on a scale. We know that people who
choose a healthy lifestyle enjoy better health,” reported Keith Bachman, M.D.,
a weight-management specialist with Kaiser Permanente’s Care Management
Institute, in a press release. Dr. Bachman emphasized a balanced diet, physical
activity, and stress management as healthy lifestyle practices.
In
addition to supporting weight loss and preventing weight gain, increasing your
muscle mass contributes to overall health and prevention of disease.
Take
skinny out of your vocabulary and focus more on healthy, strong, and fit. Get
there by incorporating more protein into your diet with Isagenix IsaLean
products (Shakes,
Bars, and Soups), IsaPro, and IsaLean Pro,
which pack in anywhere from 18 to 35 grams of undenatured whey protein to
promote and maintain muscle and strength.
For more information about this
topic and other health and wealth related topics use the following websites:
References:
- Lakoski SG, Barlow CE, Farrell SW, Berry JD, Morrow JR, Jr., Haskell WL. Impact of body mass index, physical activity, and other clinical factors on cardiorespiratory fitness (from the Cooper Center longitudinal study). Am J Cardiol 2011;108:34-9. doi: 10.1016/j.amjcard.2011.02.338
- Farrell SW, Finley CE, McAuley PA, Frierson GM. Cardiorespiratory fitness, different measures of adiposity, and total cancer mortality in women. Obesity (Silver Spring) 2011;19:2261-7. doi: 10.1038/oby.2010.345