Question

how can alex use the value he calculated in monitoring his fitness level?
○ by always exceeding 150 bpm to maximize fitness gains
○ by keeping his heart rate below 130 bpm to avoid overexertion
○ by aiming for a heart rate of exactly 130 bpm to maintain consistent exercise intensity
○ by ensuring his heart rate stays within 130-150 bpm to improve his cardiovascular fitness

Explanation:

• Option A: Exceeding 150 bpm may lead to overexertion, not safe for maximizing fitness.
• Option B: Keeping below 130 bpm might be too low for effective cardiovascular improvement.
• Option C: Aiming for exactly 130 bpm is unrealistic and too restrictive; exercise intensity can vary.
• Option D: The target heart rate zone for cardiovascular fitness is typically a range (e.g., 130 - 150 bpm for many), so staying within this range helps improve cardiovascular fitness without overexertion.

Answer:

D. by ensuring his heart rate stays within 130-150 bpm to improve his cardiovascular fitness