Final answer:
Regular exercise enhances health by reducing disease risk and boosting fitness, BMI is a measure of body fat based on weight and height ratios, and nutrition significantly affects one's fitness levels.
Step-by-step explanation:
Benefits of Regular Exercise
Regular exercise offers numerous health benefits which include a lower risk of diseases such as heart disease, stroke, high blood pressure, Type 2 diabetes, and several types of cancer. It also improves cardiovascular and muscular fitness, bone density, cognitive function, and aids in weight management.
Body Mass Index (BMI)
The Body Mass Index (BMI) is a numerical value calculated from a person's weight and height. BMI is used as an indicator of body fatness for most people and helps in assessing their risk for health problems related to weight.
Impact of Nutrition on Fitness
Nutrition plays a critical role in fitness. Proper nutrition provides the energy required for physical activities and the nutrients needed for recovery and muscle building, influencing overall fitness levels.