Introduction Good health is often considered one of life's greatest assets. It is not merely the absence of diseases but a state of complete physical, mental, and social well-being. In today's fast-paced world, maintaining good health is paramount to leading a fulfilling and productive life. This comprehensive guide explores the various aspects and benefits of good health, providing valuable insights into its value and the steps you can take to achieve and maintain it. Physical Health Regular Exercise: Engaging in regular physical activity is essential for good health . Exercise strengthens muscles, improves cardiovascular health, enhances flexibility, and boosts overall energy levels. Aim for at least 150 minutes of restrained-intensity aerobic exercise or 75 minutes of vigorous-intensity exercise per week, along with muscle-strengthening activities on two or more days a week. Balanced Nutrition: A well-balanced diet provides you...
Weight loss is associated with numerous physical and psychological benefits and is generally viewed as a positive. However, your brain, which is more concerned with preventing
you from starving yourself, doesn't necessarily see it that way. read more.
When you lose a lot of weight, your body tries to conserve
energy by reducing the number of calories you burn (1).
It also makes you feel hungrier, sluggish and increases food
cravings.
These effects can cause you to stop losing weight and become
so miserable that you give up your weight loss efforts and gain the weight
back.
This phenomenon, which is your brain's natural mechanism to
protect you from starvation, is often referred to as "starvation
mode."
This article explores the concept of starvation mode,
including what you can do to prevent it.
What does "starvation mode" mean?
What people often call "starvation mode" (and
sometimes "metabolic damage") is your body's natural response to
long-term caloric restriction.
The body responds to reduced calorie intake by reducing
calorie expenditure to maintain energy balance and prevent starvation.
This is a natural physiological response and the technical
term for it is "adaptive thermogenesis" (2).
The term starvation mode is a bit of a misnomer because true
starvation is almost completely irrelevant to most discussions of weight loss.
Starvation mode is a useful physiological response, although
in the modern dietary environment where obesity is rampant, it does more harm
than good.
Calories in, calories out
Obesity is a disorder of excessive energy accumulation.
The body stores energy (calories) in its fat tissue and
stores it for later use.
When more calories go into your fat tissue than go out, you
gain fat. Conversely, if more calories come out of your adipose tissue than
come in, you lose fat.
All weight loss diets result in a reduction in calorie
intake. Some do this by directly controlling calorie intake (counting calories,
weighing portions, etc.), while others do it by reducing your appetite, so you
automatically eat fewer calories.
When this happens, the number of calories going out of your
fat tissue (no calories) becomes greater than the number of calories going in
(calories). This is how you lose fat, which your body sees as the start of
starvation.
As a result, your body will fight back and do whatever it
takes to stop you from losing.
The body and brain can respond by making you hungrier (ie
eat more, take in more calories), but they can also affect how many calories
you burn (calories burned).
Starvation mode means your body will cut calories to restore
energy balance and prevent you from losing even more weight, even in the face
of continued caloric restriction.
This phenomenon is very real, but it's less clear if it's so
powerful that it can prevent you from losing weight, or even cause you to gain
weight despite continued caloric restriction.
Levels of these four metrics can drop as you cut calories
and lose weight. This is due to a reduction in movement (both conscious and
unconscious) and major changes in the functioning of the nervous system and
various hormones.
Studies show that losing weight reduces the number of calories burned (7).
According to one major review, this equates to 5.8 calories
per day for every pound lost, or 12.8 calories per kilogram. However, this
largely depends on how fast you lose weight. Slow, gradual weight loss due to
mild caloric restriction does not reduce the number of calories burned to the
same extent (8).
For example, if you quickly lost 50 pounds (22.7 kg), your
body would end up burning 290.5 fewer calories per day.
In addition, the reduction in caloric expenditure may be
much greater than anticipated by weight changes.
In fact, some studies show that losing 10% of body weight
and maintaining it can reduce caloric expenditure by 15-25% (9, 10).
This is one of the reasons why weight loss tends to slow
down over time and why it is so difficult to maintain a reduced weight. You may
need to reduce your calorie intake indefinitely.
Keep in mind that this metabolic "slowdown" occurs
in some groups who have difficulty losing weight, such as B. postmenopausal
women, it may be even greater. read more.