Fitness Knowledge & Habits

Req 3d — Nutrition

3d.
Discuss how good nutrition is related to the other components of personal fitness, and if you follow a nutritious, balanced diet.

Food is fuel. Everything your body does — from pumping blood to solving math problems to running a mile — requires energy, and that energy comes from what you eat. Good nutrition is not a separate topic from fitness; it is the foundation that makes all other fitness possible.

How Nutrition Connects to Each Component

Cardiorespiratory fitness and nutrition. Your heart and lungs need the right fuel to perform. Complex carbohydrates (whole grains, fruits, vegetables) provide steady energy for aerobic activities. Without enough fuel, your endurance drops and your workouts suffer. Hydration is equally critical — even mild dehydration reduces your cardiovascular performance.

Muscular strength and endurance. Muscles are built and repaired with protein. After a workout, your muscles need protein (from sources like chicken, fish, beans, eggs, nuts, or dairy) to recover and grow stronger. Without adequate protein, you will not see the strength gains you are working toward.

Flexibility and nutrition. Proper hydration keeps your muscles and connective tissues supple. Nutrients like vitamin C (found in citrus fruits and bell peppers) support collagen production, which keeps your tendons and ligaments healthy and flexible.

Body composition. This is where nutrition has its most direct impact. Your body composition is shaped by the balance between what you eat and how much energy you burn. A diet heavy in processed foods, sugary drinks, and fast food contributes to excess body fat, while a balanced diet supports lean muscle growth.

Mental and emotional fitness. Your brain consumes about 20% of your daily calories. It needs glucose from carbohydrates to function, omega-3 fatty acids (from fish, walnuts, and flaxseed) for brain health, and a steady supply of vitamins and minerals to regulate mood. Studies show that a poor diet is linked to higher rates of depression and anxiety.

What a Balanced Diet Looks Like

The USDA’s MyPlate model is a simple, visual guide to balanced eating. It divides your plate into five food groups:

A Scout's plate at a camp dining hall arranged in the MyPlate format, with colorful portions of vegetables, grains, protein, fruit, and a glass of milk

Common Nutrition Mistakes

Even Scouts with good intentions can fall into these traps:

Explore More

How the Food You Eat Affects Your Brain
MyPlate.gov The USDA's official guide to balanced eating, with interactive tools, recipes, and resources for all ages.