Q.Mr. X performs the Harvard step test for 275 seconds and his pulse in 1 – 1.5 min after exercise was 100. Write the formula of fitness index score for Harvard step test and calculate the fitness index score of Mr. X. (1+2)

Harvard Step Test Formula

The Harvard Step Test measures cardiovascular endurance -- how efficiently the heart and lungs recover after sustained physical exertion. A person steps up and down on a bench continuously for up to 5 minutes (300 seconds) at a fixed rate of 30 steps per minute, paced by a metronome at 120 beats per minute, using a bench 20 inches high for men and 16 inches high for women. If the subject cannot continue for the full 5 minutes, the test stops early, and the actual number of seconds completed is what gets used in the calculation -- never the full 300 seconds.

Immediately after the exercise stops, the subject sits down, and their pulse is counted once, over a fixed 30-second window taken between 1 minute and 1.5 minutes after exercise. This single pulse count is then used to calculate the test's result, the Physical Fitness Index (PFI):

PFI = (Duration of the exercise in seconds x 100) divided by (5.5 x Pulse count taken between 1 and 1.5 minutes after exercise)

The resulting PFI score is then read against exactly three interpretation bands -- not a wider five-band scale:

• Up to 49 = Poor
• 50 to 80 = Average
• 81 and above = Good

For example, comparing three students' Harvard Step Test scores: a score of 56 falls in the Average band, while scores of 89 and 82 both fall in the Good band -- even though 89 and 82 are quite different numbers from each other, both simply clear the same 81-and-above threshold.

Why does the exact formula matter, rather than just the general idea? Because in this test, the arithmetic itself is the point: two students who exercise for the same duration but have different recovery pulse counts will get different, calculable scores, and using the wrong version of the formula -- for example, doubling the pulse count, using the wrong duration, or applying a five-band instead of a three-band scale -- can place a student in the wrong fitness band entirely.