Metabolism is the process by which your body converts food into energy. It plays a significant role in weight loss, as it determines how many calories your body needs to function. Your basal metabolic rate (BMR) is the number of calories your body needs at rest to maintain basic physiological functions such as breathing, circulation, and cell production. Factors that influence your BMR include age, gender, muscle mass, and genetics.
When you consume more calories than your body needs, the excess is stored as fat. Conversely, when you create a calorie deficit by eating fewer calories than your body requires, your body begins to use stored fat for energy, leading to weight loss. The rate at which you burn calories also depends on your level of physical activity. Exercise increases your metabolic rate, both during the activity and for a period afterward, known as the afterburn effect.
Several factors can affect your metabolism and, consequently, your ability to lose weight. For example, muscle tissue burns more calories than fat tissue, so increasing your muscle mass through strength training can boost your metabolism. Hormones also play a role; thyroid hormones, for instance, regulate metabolism, and imbalances can lead to weight gain or loss.
Understanding the science behind metabolism can help you make informed decisions about your diet and exercise routine. By focusing on building muscle, staying active, and consuming a balanced diet, you can optimize your metabolism and support your weight loss goals.