Estimation of heart rate during exercise using photopletyhsmoraphy

Heart rate monitoring during exercise is becoming very popular due to high risk of heart attacks involved in intensive exercise. Photoplethysmography (PPG) is one such technique which is non-invasive, non- complex, and has higher usability and portability than electrocardiogram (ECG) technique. PPG signals are captured by a photodetector which records small variations in the intensity of light sent by a light emitting diode (LED). These intensity variations correspond to the changes in the volume of blood vessels.