Fitness Lessons Health And Fitness 2 — Questions and Answers
Question 1: Which macronutrient is the body's preferred source of energy during high-intensity exercise?
- Fat
- Protein
- Carbohydrate (Correct answer)
- Fiber
Correct answer: Carbohydrate
Carbohydrates are broken down into glucose, which is the primary fuel for high-intensity anaerobic exercise.
Question 2: What does the term 'progressive overload' mean in strength training?
- Lifting maximum weight every session
- Gradually increasing training stress over time (Correct answer)
- Alternating muscle groups daily
- Reducing rest periods between sets
Correct answer: Gradually increasing training stress over time
Progressive overload means systematically increasing weight, reps, or intensity so muscles continue to adapt and grow stronger.
Question 3: A person's resting heart rate is typically measured at which time?
- Immediately after exercise
- After a large meal
- In the morning before getting out of bed (Correct answer)
- Mid-afternoon
Correct answer: In the morning before getting out of bed
Resting heart rate is most accurately measured in the morning before physical activity or stimulants affect the reading.
Question 4: Which type of stretching is generally recommended BEFORE a workout to prepare muscles?
- Static stretching
- Ballistic stretching
- Dynamic stretching (Correct answer)
- PNF stretching
Correct answer: Dynamic stretching
Dynamic stretching uses controlled movement through a full range of motion, warming muscles without reducing force production.
Question 5: What is the primary function of the lymphatic system in relation to fitness?
- Producing red blood cells
- Removing waste products and supporting immune function (Correct answer)
- Regulating blood pressure
- Synthesizing hormones
Correct answer: Removing waste products and supporting immune function
The lymphatic system removes metabolic waste, excess fluid, and pathogens, playing a key role in recovery and immune defense.
Question 6: Which vitamin is synthesized by the skin when exposed to sunlight and supports bone health?
- Vitamin A
- Vitamin C
- Vitamin D (Correct answer)
- Vitamin K
Correct answer: Vitamin D
Vitamin D is produced when UVB rays hit the skin and is essential for calcium absorption and bone mineralization.
Question 7: How does regular aerobic exercise affect LDL cholesterol levels over time?
- It significantly raises LDL
- It has no effect on LDL
- It tends to lower LDL levels (Correct answer)
- It converts LDL to HDL
Correct answer: It tends to lower LDL levels
Consistent aerobic activity generally lowers LDL ('bad') cholesterol and raises HDL ('good') cholesterol, reducing cardiovascular risk.
Fitness Lessons Health And Fitness 2
Which macronutrient is the body's preferred source of energy during high-intensity exercise?