RATE OF PERCIEVED EXERTIONS….THE BEST METRIC ? PHYSIOLOGY FIRST RPE is the best subjective estimate of ongoing exercise across all population . Instruments donot calculate ,decipher or guide as our brain does to all the sensory inputs it receives from musculoskeletal,gastrointestinal, endocrinal , respiratory and metabolic pathways . It measures the FEEL … A combination of what the above systems are going through with the central motor commands on the feedbacks . It benefits recreational runners as it’s free,easy to…