Weight loss metabolism slows
As you get older, the amount of muscle tends to decrease and fat accounts for more of your weight, slowing down calorie burning. This explains why men, who have a high proportion of muscle, have a faster metabolism than women, and why a 20-year-old has a higher metabolism than a 70-year-old - again, they have more muscle. The main way it does this is to protect its fat stores and instead use lean tissue or muscle to provide it with some of the calories it needs to keep functioning. This directly leads to a loss of muscle, which in turn lowers metabolic rate so that the body needs fewer calories to keep ticking over and weight loss slows down. Mayo Clinic Health Letter Medical Products Population Health and Wellness Programs Health Plan Administration Medical Laboratory Services Continuing Education for Medical Professionals Giving to Mayo Clinic Give Now Your Impact Frequently Asked Questions Contact Us to Give Give to Mayo Clinic Help set a new world standard in care for people everywhere. Give now. In addition to your basal metabolic rate, two other factors determine how many calories your body burns each day. But surprisingly, rather than helping us to reach our target weight more quickly, severely restricting calories actually prevents our bodies from burning unwanted fat stores effectively - and unfortunately, this means that weight loss slows down. This content has not been translated into English. Our general interest e-newsletter keeps you up to date on a wide variety of health topics. Digesting, absorbing, transporting and storing the food you consume also takes calories. Ultimately, muscle burns a lot more calories than fat so when we lose muscle, our metabolic rate drops and we burn fewer calories. Metabolism and weight loss: How you burn calories Find out how metabolism affects weight, the truth behind slow metabolism and how to burn more calories. While aerobic activities such as jogging, swimming, fast walking and aerobic classes help to tone muscle and burn fat, strength or resistance training in particular will increase the amount of muscle you have in your body. But contrary to common belief, a slow metabolism is rarely the cause of excess weight gain.
During this complex biochemical process, calories in food and beverages are combined with oxygen to release the energy your body needs to function. Your basal metabolic rate accounts for about 70 percent of the calories you burn every day. Several factors determine your individual basal metabolic rate, including. The metabolic rate - the rate at which the body burns calories - is partly determined by the amount of muscle we have. Physical activity and exercise — such as playing tennis, walking to the store, chasing after the dog and any other movement — account for the rest of the calories your body burns up each day. This mechanism, which is thought to have evolved as a defence against starvation, means the body becomes super efficient at making the most of the calories it does get from food and drink. Dieting and Metabolism Dietitian, Juliette Kellow explains how dieting can affect metabolism and how you can increase your metabolic rate. Request an Appointment Find a Doctor Find a Job Give Now. This accounts for 100 to 800 of the calories used each day. Metabolism is the process by which your body converts what you eat and drink into energy. Men usually have less body fat and more muscle than do women of the same age and weight, burning more calories. And this means dieting sensibly with a suitable, rather than a very low calorie intake so that you lose fat rather than muscle. The number of calories your body uses to carry out these basic functions is known as your basal metabolic rate — what you might call metabolism. And the way to do this is, of course, to increase the amount of exercise you do. In fact, research shows that the body loses a proportionately high amount of muscle with a very low calorie intake and this may considerably suppress metabolism by up to 45 percent. The bodies of people who are larger or have more muscle burn more calories, even at rest.
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