Step 1: Understanding the Concept:
The Harvard Step Test was developed by Lucien Brouha and his associates in 1943 to assess the aerobic fitness of soldiers.
Cardiovascular (Aerobic) endurance is the ability of the heart, lungs, and blood vessels to deliver oxygen to tissues during sustained physical activity.
The test is based on the principle of "cardiac recovery": a person with a more efficient cardiovascular system will have a heart rate that returns to its resting level much faster after exertion than a person who is less fit.
Step 2: Detailed Explanation:
1. The Protocol:
The test requires the athlete to step up and down on a stable bench (20 inches high for men, 16 inches for women) at a fixed cadence of 30 steps per minute.
This rhythmic movement is continued for 5 minutes (or until the athlete can no longer keep pace).
2. Measurement:
The primary data collected is the heart rate during the recovery phase (at 1-1.5 min, 2-2.5 min, and 3-3.5 min after stopping).
A "Fitness Index" is calculated. A higher score indicates superior cardiovascular endurance.
3. Why not other options?
- Leg Power: Measured by explosive movements like the Standing Broad Jump. The Step Test is too long and rhythmic to measure "explosive" power.
- Abdominal Strength: Measured by the Partial Curl-up test.
- Flexibility: Measured by the Sit and Reach test.
Step 3: Final Answer:
The Harvard Step Test is specifically designed to measure the efficiency of the circulatory system under load, making it a test of Cardiovascular Endurance.