Target Heart Rate
The heart incessantly and rhythmically beats about 72 times in a minute. This is termed as heart rate.

The Target Heart Rate is 60-80% of the Maximum Heart Rate (MHR)

Enter your age: 
Your Gender:
Male    Female
While you are exercising...  
You should count between:

and beats in sec.

and it should not exceed  beats.
 
Disclaimer : This tool is intended for information use only. Do not rely on it to make decisions about your health. Always consult your doctor for personal medical advice.