Exercise bike and operation method thereof

An exercise bike comprising:

• a pedaling mechanism, a user performing a pedaling activity through the pedaling mechanism;
• a resistance unit connected to the pedaling mechanism, the resistance unit providing and determining a resistance of the pedaling activity;
• a guidance unit;
• a database;
• and
• a processing unit coupled to the database, the resistance unit and the guidance unit,
• wherein the processing unit controls the resistance unit to adjust the resistance of the pedaling activity to be a plurality of pedaling resistances and inquires the user about a rate of perceived exertion through the guidance unit to obtain a plurality of psychological values respectively corresponding to the pedaling resistances when the exercise bike is in a test mode,
• the database storing a first correspondence relationship between the plurality of psychological values and a plurality of heart rates of the user, the processing unit respectively converts the plurality of psychological values into the plurality of heart rates according to the first correspondence relationship, the processing unit performs calculation by using the plurality of heart rates to obtain a plurality of exercise intensities respectively corresponding to the pedaling resistances and further obtain a second correspondence relationship between the exercise intensities and the pedaling resistances, and after the test mode ends, the processing unit determines a recommended pedaling resistance according to the second correspondence relationship, so as to provide the recommended pedaling resistance to the user for performing the pedaling activity when the exercise bike is in a sport mode, wherein the processing unit makes the calculation according to an equation ES=(AHR−RHR)/(MHR−RHR), wherein ES is an exercise intensity of the exercise intensities, AHR is an average heart rate of the user, RHR is a resting heart rate of the user, and MHR is an estimated maximum heart rate of the user,
• wherein before the exercise bike enters the test mode, the processing unit controls the resistance unit to adjust the resistance of the pedaling activity to be a specific pedaling resistance when the exercise bike is in a practice mode, so as to provide the user with a rhythmic practice of the pedaling activity at a rotational speed,
• wherein after the practice mode ends, the exercise bike enters the test mode after rest if a coefficient of variation of the rotational speed in the practice mode falls within a safety range, and the exercise bike enters the practice mode again if the coefficient of variation of the rotational speed in the practice mode exceeds the safety range.