Question

analyzing a resting heart rate
what does a decreasing resting heart rate over time generally indicate about an individual’s cardiovascular fitness?
○ it could suggest that the individual is getting older.
○ it suggests that the heart is becoming less efficient.
○ it could indicate a need for more intense aerobic exercise.
○ it signifies improved cardiovascular fitness and heart efficiency.

Explanation:

• Option 1: Aging typically leads to an increase or less efficient heart function, not a decrease in resting heart rate as a sign of aging in terms of fitness.
• Option 2: A less efficient heart would likely have a higher resting heart rate or struggle, not a decreasing one.
• Option 3: A decreasing resting heart rate usually means the heart is more efficient, so more intense exercise isn't needed for that reason.
• Option 4: As cardiovascular fitness improves, the heart becomes more efficient, so it can pump more blood with fewer beats at rest, leading to a lower resting heart rate.

Answer:

D. It signifies improved cardiovascular fitness and heart efficiency.