1. Body size and composition– overweight people with more muscle mass burn more calories, even during the rest, so they are more likely to have a faster metabolic rate not a slower one.
2. Sex– men probably have less body fat and more muscle mass than does women of the same age that is the reason they burn more calories.
3. Age – when you get older, your muscle mass decreases, which cuts down the rate at which you burn calories.
While many people believe that their extra pounds are charged in a not active metabolism, in most cases the problem arises from taking more calories than are burned off. Even those people who exercise regularly compensate for their increased activity by overeating. They are sure that they burned off more calories than they did in reality. However, in some cases, a low metabolic rate can play a great role in weight gain. Let’s have a look on the most common causes of a slow metabolism.
2. Age – it is known that lean muscle mass burns more calories than fat tissue. When you have a higher percentage of muscle mass, your metabolism is faster. As you get aged, the percentage of lean muscle mass you have naturally decreases and is slowing down your metabolism. Training is important for any age group, but it is especially important for adults after the age of 25.
3. Lifestyle factors can be the cause of a slow metabolism. Some medications, particularly those which are used to treat depression, may cause the slowing of metabolism. The same can do skipping meals and fasting. If you skip a meal, your body goes into a survival or resting mode. When in this state, your body responds to a lack of food by slowing down your metabolism in an effort to store calories. This leads to a decreased metabolic rate and probably weight gain. To prevent the body from entering this starvation mode and keep your metabolism running effectively- eat small meal or snack every two to three hours.
Even though there are some marked lifestyle habits and things you can’t control like your advancing age that can cause a slow metabolism, a decreased metabolic rate is usually the result of an underlying hormonal disorder.
5. Cushing’s Syndrome – a disorder that develops when your tissues are exposed to cortisol- a hormone responsible for maintaining the metabolism of proteins, carbohydrates and fats- for an extended period of time. This prolonged exposure slows down metabolism, which can result in obesity, increased fat around the neck and a rounded face.
6. Hypothyroidism – a disorder which is characterized by an underactive thyroid gland. When this gland does not produce enough thyroid hormones all of the processes taking place in our body including metabolism slow down.
7. Diabetes – It is not yet completely clear why diabetics have slow metabolisms, but they seem to have more trouble with taking off weight than non-diabetics. This fact may be related to their higher blood sugar levels which fools the body into believing there is lots of energy around, resulting in a slowing down in metabolism.