Those days Reading your heart rate only when you go to the doctor is really a thing of the past. You don’t even have to spend a fortune or leave the house to know your heart rate during exercise or at rest.
The proliferation of optical and EKG (electrocardiogram) sensors can now reliably deliver that information from your wrist, chest or arm, meaning you can clearly understand than you achieved in that training class and have a chance to enter the most stressful periods of your day.
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