“…For example, according to this review, a heart rate can be monitored from different perspectives such as photosensors (wearables), electrodes (mobile/wearable/textile), and cameras sensing (mobile). [28,220], cystic fibrosis [221], dehydration [115,175], dyskinesia, drug-induced [54], health behaviour [108,121,133,149,156,192], musculoskeletal diseases [182], neoplasms [26], obesity [107,111,186,222], peripheral arterial disease [40], ulcer [116], and vision disorder [141].…”