AFAA Nutrition and Weight Management 2

Question 1

Which mineral is critical for muscle contraction and bone health?

Accepted Answer

Calcium

Answer

Calcium is essential for bone mineralization, nerve transmission, and triggering muscle contraction via the troponin-tropomyosin complex.

Question 2

Pre-exercise nutrition should emphasize which macronutrient to optimize performance?

Accepted Answer

High carbohydrate

Answer

Consuming carbohydrates before exercise tops off muscle glycogen stores and sustains blood glucose for improved endurance and performance.

Question 3

What percentage of daily caloric intake is generally recommended to come from carbohydrates for active individuals?

Accepted Answer

45–65%

Answer

The USDA Dietary Guidelines recommend 45–65% of total calories from carbohydrates for most active adults.

Question 4

Dehydration of as little as what percentage of body weight can impair athletic performance?

Accepted Answer

1–2%

Answer

A fluid loss of just 1–2% of body weight can reduce endurance performance, impair cognitive function, and increase perceived effort.

Question 5

Which type of fat is considered most harmful to cardiovascular health?

Accepted Answer

Trans fat

Answer

Trans fats raise LDL cholesterol, lower HDL cholesterol, and significantly increase cardiovascular disease risk.

AFAA - Aerobics and Fitness Association of America Practice Test