1. Subjective feelings: If the exercise load is properly arranged, the subjective feelings of the exerciser should be energetic, energetic, comfortable and eager to exercise.

2. Sweating capacity: When the exercise load is appropriate, the human body may sweat slightly or moderately. If the load is too large and the body is too tired, the exerciser will sweat and get soaked. Of course, the amount of perspiration depends on temperature, air pressure, wind speed and water consumption.

3. Emotion: Emotion is a "barometer" of people's health, and it is also a subjective indicator to measure the load borne by the human body. Generally speaking, the human body has the need for exercise, and when this need is met, people will have a pleasant emotional experience.

Estimation method:

The general motion estimation method is as follows: let the frame image at time t be the current frame f (x, y) and the frame image at time t be the reference frame f'(x, y), which can lead or lag the current frame in time, as shown in figure 1. When?

When searching for the best match of the blocks in the current frame T in the reference frame T', the corresponding sports field D (x; T, t+t △), the motion vector of the current frame can be obtained.

Baidu encyclopedia-motion estimation