Author Topic: Calories and Dieting  (Read 214 times)

TylerDurdinUMD

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Calories and Dieting
« on: March 18, 2019, 03:35:18 PM »
Science is slowly pushing into the lay population of how all calories are not made the same.  Different types of food impact your body and your hormones, unlocking and locking different pathways for energy, weight gain, and fat loss. 

I've been following this for a few years, and unfortunately never found a good way to explain it.  I got a pretty good auto-email today which outlines how a low calorie but dominant carbohydrate diet will backfire for fat loss goals.  Excerpt:

Quote
Starving While Being Overweight
Let’s think about this in a more typical, real-life situation. We’ll use a fictitious woman named Julie. Julie needs to lose 100 pounds of extra body fat. She can attack this goal a couple different ways. One would be what’s still most common today. She could go on a 1200-1400 low-calorie diet often recommended to overweight women (men are often told to eat 1600-1800 in cases like this).
Her focus is on getting the most enjoyment out of the limited number of calories she can eat each day, so she resorts to a variety of pre-packaged, low-fat foods like cereal, low-calorie juice, snack packs, some fruit, and other whole grain foods. If she’s a little more in tune with what her body needs, she’ll also sneak in some low-fat or fat-free protein like chicken breasts, non-fat yogurt or fat-free cheese.

Because the majority of the foods in her diet come from carbohydrates, her insulin levels remain elevated throughout the day. When insulin is high, fat cells cannot release their stored fatty acids for energy. Instead, the body uses whatever glucose it can from the blood stream or what’s stored in the liver as glycogen. When the glucose levels get used up, hunger strikes and Julie will be looking for another high-carb, low-fat snack to curb her appetite.

In this scenario, even though Julie’s calorie levels are low, and she should be burning more calories than she eats, she still can’t access her extra fat. Without access to the stored fat for energy, the body responds by stimulating hunger and lowering metabolic rate. If it doesn’t have access to energy, it will respond by burning less energy. Though her body is a “rich” source of energy from all the fat it has stored up, it’s almost useless since Julie spends most of her day eating foods that limit the ability of her fat cells to release the stored fat.

Full Article:
http://www.lifetime-weightloss.com/blog/2019/3/11/heres-when-calories-really-matter.html

vripley

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Re: Calories and Dieting
« Reply #1 on: March 18, 2019, 06:48:13 PM »
Fascinating topic. I feel like we've barely seen the tip of the iceberg on all of this, but we seem to move closer and closer every year.