Diet and exercise are two important factors in overall health. Ignoring either of these factors can lead to a variety of different diseases.
Healthy eating requires a balanced diet. This means eating a wide variety of foods in the right proportions from the different food groups.The different food groups and their functions are:
- Carbohydrates = to release energy
- Fats = also to release energy, and to keep warm
- Protein = for growth and repair
- Fibre = to make the digestive system runs smoothly
Someone who doesn’t have a balanced diet is said to be malnourished. Malnourished people can be thin or overweight and can increase the risk of diseases like obesity. Other health problems include a greater risk of diabetes, heart disease, and cancer.
The amount of food someone should eat depends on their metabolic rate. This means the speed of chemical reactions within cells (metabolism). The higher the metabolic rate, the more food someone should eat.
The different factors that affect metabolic rates are:
- Genetics = due to genetic factors someone can have a lower or higher resting metabolic rate
- Exercise = more exercise increases someone’s metabolic rate
- Sex = men generally have a greater resting metabolic rate than women