Diets can come under various categories depending on specific and individual needs.
People, who are training, such as athletes, may need to follow a particular regimen in order to gain muscular weight and improve their physical achievements.
For those whose objective is weight loss, various methods and diets can be undertaken. Every person has a metabolism that works accordingly for each different individual, the type of diet will change depending on the persons body mass and metabolic function as well as the lifestyle. Generally, people find it difficult to maintain their ideal weight once they have lost it; only a minority manage to keep their weight loss in check.
There are also cases of underweight problems, notably people suffering from anorexia, whose weight gain programme will be similar to that of athletes, although they will be merely rebuilding the muscle and fat necessary to the body and the fundamental supplies of nutrients.
Amongst these there are often actors or people with related jobs, which often need to lose or gain weight for determined parts they may be playing.
During childhood and adolescence a nutritious and healthy well balanced diet is fundamental for development of the body and brain. Any form of food restriction will lead them to overeat when they become adults and my cause deficiencies. A diet poor in nutrients essential for the bodys development may cause serious damage in adult life. In addition the lack of proper nutrients can damage the brains sensory system, which will not be able to connect the various nutritional values with taste.
Regular exercising is fundamental for a healthy condition as well as during weight loss, the exercise will burn up the fatty acids stored in our body once the glycogen has been used up, hence result in weight loss. Aerobic exercising will also keep the body in good general condition, influencing the way our heart functions, by reinforcing the muscle tissue.
For an effective weight loss, it is important to keep up the exercise programme for at least twenty minutes, for this will help use up more fatty acids. While exercising the body initially uses up the stores of glycogen in the body, then in a second stage goes on to use fatty acids, this is when we start to burn up our fat reserves, hence we start losing weight.
In order to control the kind of weight we lose, notably fat rather than muscle tissue we can use methods such as weight lifting or any other kind of strength enhancing exercises, in conjunction with an appropriate protein intake.
It is though essential to regulate the protein intake, for excess quantities can damage the kidney or liver and even increase the risk of heart diseases.
The energy the food we consume provides is controlled by the way our digestive system breaks down and uses up the energy provided. Other factors that determine the energy produced can be hormone levels and our actual weight. Chewing can also affect the absorption of micronutrients, notably proteins, fats and sugars.