According to the paper of the Group of cardiologist Milind Y. Desai, Cleveland Clinic Ohio: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6732081/ with the exercise protocol: “In each subject, right and left wrist circumferences were measured using a tape measure to ensure that no wrist was too small for the watch strap. Wrist-worn monitors were affixed above the ulnar styloid. Once …