It is not
uncommon to hear a friend or family member say that they are trying to lose
weight. In fact, the vast majority of us spend our entire lives struggling to
maintain a weight that is healthy or desirable. There are certainly many people
that are over-eating or under-exercising for their caloric requirements. But
what about the rest of us? For some individuals, it doesn’t matter how little
we eat because the weigh scale doesn’t seem to budge! Weight loss can be quite
complex with many contributing factors and the simple reality is that cutting
calories is not a clear solution for losing weight. Here’s why.
Calorie
Counting Is Good… In Theory: When we eat food, we are consuming energy.
When we
exercise or create movement, we are burning energy. When attempting to lose
weight, the simplest goal is to eat less energy relative to the amount of
energy that your body outputs. In fact, it has often been stated that an energy
deficit of 3500 kcal will lead to fat loss of exactly one pound because that’s
how much energy is provided when you break down fat. And this will work in many
people. But this simple equation does not take into account the type of
macronutrients or micronutrients that you are actually consuming, nor does it
consider the strong influence of hormones as we’ll discuss below.
A Calorie is Not Just a Calorie: Most people that have done their own dietary research know that the human body does not respond to refined carbohydrates (ie. added sugars) the same way that it does to protein, fats or even complex carbohydrates. When we eat natural sugars found in fruit that are paired with the high fibre content, we have a blunted rise in blood glucose and insulin. If you eat the same number of calories from a donut, your sugar spikes and excess sugars become converted and deposited into fat. Similarly, low-carbohydrate diets have consistently shown greater weight loss when compared to low-fat diets with equal caloric intake. Physiologically, the body treats fats, proteins and carbohydrates quite differently.
What
About Hormones? The
thyroid is largely responsible for maintaining a proper metabolic rate, meaning
that it dictates how fast or slow our cells burn energy. This explains why
those with low thyroid function can present with weight gain or the inability
to lose weight. If you haven’t had your thyroid function checked by your
doctor, this is a great place to start. However, just as your thyroid needs to
be balanced to maintain a healthy weight, so does your estrogen, progesterone,
testosterone and cortisol. Factors such as stress, poor liver function and
nutritional deficiencies can all imbalance these crucial hormones.
The
Importance of Stress: When we are stressed, our body releases cortisol. Cortisol is a hormone
that tells the body to release sugar into the blood. This is great to provide
energy to get through a short stressful event, but what about when cortisol is
elevated for days, weeks or months at a time? Imbalanced sugar levels can lead
to fat deposition over the long haul! Stress management is so important, in
fact, that some research has found stress-management programs with no dietary
changes to be more effective for weight loss than dietary changes alone.
Sleep and
its role in Weight Management: A large-scale study examining sleep habits in over 86,000
postmenopausal women found a strong association between both lack of sleep and
excess sleep with obesity risk. Other studies have found shorter and longer
sleep durations to be associated with greater body mass and greater abdominal
fat measurements.
Sleep
deprivation’s association with obesity appears to be due not only with
behavioral changes (such as exercising less when you’re tired), but also to
hormonal dysregulation. Sleeping less than 6 hours per night results in blood
sugar imbalances, insulin resistance and, ultimately, widespread inflammation
in the body.
Environmental
Toxins: There is
now a mountain of evidence to show that toxins in our environment can play a
great role in body size. Ongoing exposure to chemicals with names like
hexachlorobenzene, polybrominated biphenyl and phthalates can wreak havoc on
your hormones and your weight loss attempts. Start eliminating the plastics and
use glass containers or water bottles instead. Reduce your daily makeup and
cosmetic exposure when possible. Avoid unnecessary air-fresheners,
chemical-laden cleaners and pesticides. These small changes will all add up.
As you can clearly see, there is much more to consider than just calories in
and calories out when it comes to weight loss. Eating real food, getting
restful sleep, avoiding toxic chemicals, improving relationships and minimizing
stressors in your life will all help to normalize your hormones and improve
your weight in the long-run.
Select References:
Jenkins DJ et al. Glycemic index: overview of implications in health and disease. Am J Clin Nutr. 2002 Jul;76(1):266S-73S.
Diana Fernandez et al. Images of a Healthy Worksite: A Group-Randomized Trial for Worksite Weight Gain Prevention with Employee Participation in Intervention Design. American Journal of Public Health, 2015; e1
Patel SR et al. The association between sleep duration and obesity in older adults. Int J Obes (Lond) 2008;32(12):1825–1834
Hairston KG et al. Sleep duration and five-year abdominal fat accumulation in a minority cohort: the IRAS family study. Sleep 2010; 33, 289–295.
Tang-Péronard JL et al. Endocrine-disrupting chemicals and obesity development in humans: a review. Obes Rev. 2011 Aug;12(8):622-36.
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