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[[File:Garmin310XTHeartRateSimplified.jpgpng|right|thumb|right500px|200px|The Garmin 310XTA simplified chart of [[Heart Rate]] against exercise intensity showing [[Maximum Heart Rate]], [[Heart Rate Reserve]], which includes heart rate monitoring capability[[Resting Heart Rate]] and [[Heart Rate Deflection]].]]There are three common methods of measuring [[Heart Rate]]:* '''Electrical'''. The most common approach for measuring Heart rate monitors Rate during exercise is to use a strap across the chest to detect record the electrical impulses from the heart and display [[Heart Rate]]. Using the electrical impulses , which is a highly accurate technique. The strap is a mild inconvenience, but most modern straps are fabric and reasonably comfortable for running distance up to around 50 miles. For longer distances, chaffing from the heart rate strap can be an issue. A [[Best Running Watch|good running watch]] will include not only a heart rate monitor, but also provide the ability to transfer a recording of the heart rate to a computer for detailed analysis and recording. If you* ''re having problems with a Garmin 'Optical'''. An emerging technique for measuring Heart Rate Monitoris to use optically measure the filling of the capillaries under the skin. This technique is accurate enough to give a reading overall heart rate, there but current devices are not accurate enough for measuring [[Garmin Heart Rate Monitoring|some fixes you can tryVariability]]. Also (This is the technique used by a [[Pulse Oximeter]] can be used to measure , but they don't work during exercise and are only useful for [[Resting Heart Rate]].)* '''Pressure'''. A blood pressure meter will detect heart rate from the pressure changes in the cuff. However, this is not suitable for use during exercise.