An exercise-hardness data output apparatus outputs exercise hardness of an exercise which a user takes, as exercise-hardness data, which can be used for general purposes in the exercise physiology. Using the apparatus, the user can objectively learn the exercise hardness of his (or her) exercise for keeping himself healthy or for developing his physical strength. The exercise-hardness data output apparatus calculates exercise hardness data from counted pulse number of the user and his age, and outputs the exercise-hardness data. Further, the exercise-hardness data output apparatus calculates and displays a predetermined pulse-number range indicating the most suitable exercise hardness for the age of the user. <IMAGE>
Exercise-hardness data output apparatus