Quick answer: Health terms such as BMI, calorie and metabolism describe basic ideas about the body, food and activity. Understanding them helps you read labels and talk with your doctor.
This article is for general information and is not medical advice. Speak with a qualified professional about your own health.
BMI
BMI stands for body mass index. It is a number calculated from your weight and height and is used as a rough screening tool for weight categories. It does not measure body fat directly, so it can be misleading for very muscular people or older adults.
Calorie
A calorie is a unit of energy. Food gives your body calories, and your body uses them for everything from breathing to walking. Eating more energy than you use over time can lead to weight gain, while eating less can lead to weight loss.
Metabolism
Metabolism is the set of chemical processes that turn food into energy and building material. People often say they have a “fast” or “slow” metabolism. In reality, age, muscle, sleep and genes all play a role.
Hydration
Hydration means having enough water in the body. Water supports temperature control, digestion and joint health. Needs vary with climate, activity and health, but pale yellow urine is a simple everyday sign of good hydration.
More Useful Words
- Nutrient: a substance in food that the body needs, like protein or vitamins.
- Macronutrients: carbohydrates, proteins and fats, needed in larger amounts.
- Micronutrients: vitamins and minerals, needed in small amounts.
- Cardio: exercise that raises your heart rate, such as brisk walking.
- Resting heart rate: beats per minute when you are calm and still.
- Immunity: the body’s ability to defend itself against illness.
Reading Food Labels
- Check the serving size first.
- Look at calories per serving.
- Compare sugar, salt and fibre.
- Remember that ingredients are listed from largest to smallest.
Final Thoughts
You do not need a science degree to understand health words. A few clear definitions make nutrition and fitness advice easier to judge, and they help you ask better questions at your next check-up.
