How starvation impacts the body
Your body needs to be in a calorie deficit in order to lose weight, which may be achieved by either taking less calories from food or burning more calories via activity. A greater calorie deficit, however, does not automatically imply that you will lose weight and keep it off.
Even if you might lose a lot of weight at first, it could be tough for you to keep it off in the long run.
Even worse, if you starve yourself, your body may learn to cope with severe caloric deficiencies. Your targeted weight loss program may be hampered by this in the first place.
Your metabolic rate slows
Your body starts to use its fat reserves as its major energy source under prolonged calorie restriction, and muscle and skeletal tissue as its backup energy sources.
Through adaptive thermogenesis, your body gradually lowers your resting metabolic rate (RMR) in response to calorie restriction (metabolic adaptation). Your body uses less energy to burn calories as a result in an effort to conserve as much energy as possible.
This was demonstrated in a groundbreaking research on 14 contestants from “The Biggest Loser.” Participants lost 129 pounds (58.3 kg) on average throughout the 30-week period, and their RMR decreased from 2,607 to 1,996 calories per day on average.
Despite gaining 90 pounds (41 kg) on average, their average RMR remained repressed (1,903 calories per day).
These findings imply that in order to maintain their weight, individuals would need to consume fewer calories and burn more calories, making it harder to maintain weight reduction.
Recent research, however, indicates that when there is no longer a calorie shortfall, metabolic adaption slows down. Most weight regain is believed to be caused by consuming too many calories, which may be brought on by increased hunger and a sense of freedom from calorie restriction.
Additionally, a slower metabolic rate may make you more easily tired. This is a clever defense strategy your body employs to stop you from using excessive amounts of energy. To encourage you to eat, your body also releases more hormones that make you feel hungry.
In the end, your body will make a valiant effort to stop additional weight loss by decreasing your metabolism, particularly during periods of protracted famine.