Step experiment is a quantitative load function experiment, which is mainly used to measure the function of cardiovascular system, and can also indirectly infer the endurance of the body. Because the height and frequency of steps are fixed, the step experiment is that each subject completes a fixed load in a fixed time (180 seconds). This index is calculated according to the recovery speed of heartbeat frequency in recovery period, so as to reflect the endurance of the heart to exercise load, and compare the advantages and disadvantages of heart function under the condition of relatively equal exercise ability. When completing the same exercise load, the greater the potential of using cardiac output, the faster the heart rate (pulse frequency), the lower the index and the lower the level of cardiac function, and vice versa.

Regular long-distance running, football, basketball, swimming, skating and other sports can obviously improve the function of cardiovascular system and improve the health level. The specific manifestations are exercise-induced heart enlargement, increased stroke output, bradycardia and decreased blood pressure. Cardiovascular function has the following characteristics when completing quantitative load: after exercise, it can quickly mobilize the cardiovascular system to meet the needs of exercise; The recovery period after exercise is short, and it can quickly return to the level of quiet state. In other words, regular physical exercise, especially endurance exercise, can improve cardiopulmonary function, accelerate the recovery of heart rate after exercise and improve the level of step test.

The step test in the scoring table used in the standard is an integer, so this integer is reserved for scoring when calculating the step test index.

Evaluation index =

Duration of up-and-down movement on the treadmill (seconds) × 100

2× (sum of three pulse measurements)

There is a comparison table at the back of the college students' health handbook for specific data. Is that handbook available to every college student?