Heart rate is one of the most important health parameters that is directly related to the soundness of the human cardiovascular system. The increasing number of heart attacks occurring in gyms and fitness training centers inspired us to create a system, which monitors the speed of a treadmill depending on the heart rate and age of the subject. The prototype of the project makes use of Arduino Due, in which the input is a person's age. A heart rate sensor, also used as an input measures the

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... rate of the person. A pre calculated threshold value, designated as 'normal heart rate' is fed into the microcontroller and depending on the output of the heart rate sensor, LCD displays whether the subject's heart rate is normal, above normal or he/she is in danger. A buzzer is also interfaced to the microcontroller to alarm the people around the patient in case he/she is not able to help himself/herself. Thus, if the heart rate of the person running on the treadmill is above or below the pre calculated 'normal rate', the speed of the treadmill is varied accordingly. The designed device being noninvasive, can easily find its place in health care and safety monitoring systems.