Slimming Why make active exercise and sports even thicker

Sufficient sports to accept effectively?

Many people have problems with their weight and would like to lose a few pounds. Researchers now found that exercise and exercise alone do not seem to be the key to weight loss.

The researchers at Vanderbilt University found in their recent research that exercise alone does not seem to be an effective way to reduce body weight. The physicians published the results of their study in the English-language journal "Diabetes".

More exercise and lose more weight at the same time?

When mice are provided with an impeller, the animals begin to run in it. This movement causes the animals to consume more energy. However, this increased energy expenditure can not burn many extra calories because the mouse moves less when not active on the wheel.

Weight loss lower than expected

The results of the study may have implications for people trying to lose weight and achieve that goal through more exercise or exercise. Movement alone is not an effective way to lose weight, study authors say. Laboratory animals lost far less weight than previously thought when researchers calculated how many calories the mice burned on their workouts.

More hungry for the sport?

It is possible that sportspeople (and in this case also animals) develop more hunger and therefore consume additional calories after physical activity. Those affected could also be more sedentary if they are not exercising. These changes could compensate for the energy consumed by training, the study authors speculate. As a result, the overall energy consumption of the affected person does not change and the weight of a human or a rodent remains the same.

Every movement of the mice was closely monitored

However, finding proof of this conjecture was not easy. It is difficult to accurately quantify the impact of physical movement on weight. Especially mice move a lot outside a wheel. The researchers had the idea to use infrared rays. So the experts wanted to see how the animals move in their cages. Sophisticated software can then use this information to map daily patterns of physical activity. So it can be determined exactly where and how long the animals roam, run or spend their time elsewhere. The scientists used this technology to monitor the movement of the mice before and after training. For this purpose special metabolic chamber cages were used. These can quantify how much energy the animals consumed per day.

How did the experiment go??

The researchers attached wheels to the cages and then allowed young, healthy, normal-weight, male mice to roam free for four days. During this time, the wheels were initially not unlocked, explain the experts. So the physicians wanted to collect basic data about the metabolism and the natural movement patterns of the mice. Later, the wheels were unlocked and for nine days the mice could move freely in their cages. The animals were also allowed to eat as much as they wanted during this period.

Movement pattern of the animals changed considerably

The mice sometimes ran for hours in the wheels. The animals showed a subsequent increase in their daily energy expenditure, according to the metabolic measures, which can be explained by the additional movement. The mice did not change their eating habits. Although they burned more calories, they did not eat any more, say the scientists. However, the movement pattern of the animals changed considerably. Almost immediately after they started using the wheels, the animals stopped walking in their cages as they had done before unlocking the wheels.

Results of the study

The changes in the way the animals spent their time meant that the additional calorie costs were almost neutralized by walking, Dr. Daniel Lark from the Vanderbilt University School of Medicine. The calorie deficit of the animals would have been about 45 percent higher if the animals had not stopped moving after training in the wheels, according to the experts' calculations. Why the mice moved less in the cages is still uncertain. Lack of time or fatigue, however, does not seem to have been the reason. Lark.

Further research is needed

In general, the mice showed a slightly negative energy balance. The bodies and brains of the animals probably felt the beginning of an energy deficit after the animals started running in the wheels. Apparently, biological signals are sent out, which then led the animals to become more sedentary and save energy, the researchers speculate. Future studies must now examine how physiologically the bodies of rodents perceive the changes in their energy balance and at what point they could start to eat more. (As)