| 摘要 |
A heart rate monitor includes a measuring means for measuring the heart rate of a person during a fitness exercise, and a calculation unit for forming the value of one or more stress parameters from the heart rate measured during the fitness exercise. The calculation unit is arranged to compare the stress parameter value during the fitness exercise with a threshold value formed for the stress parameter before the fitness exercise. The heart rate monitor also includes a display means for showing exceeding of the threshold parameter to the user during the fitness exercise. The calculation unit is arranged to use the value of expiratory flow measured from the person before the fitness exercise for forming the threshold value of the stress parameter.
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