National University of Singapore Apr 1 2026 Burnout and chronic fatigue carry a substantial economic cost and pose serious risks in professions where alertness is critical. Yet diagnosing fatigue and related mental health conditions today relies largely on self-reported questionnaires, which tend to be subjective, intermittent and poorly suited to real-time evaluation. Wearable devices could fill the gap by continuously tracking cardiovascular markers linked to the autonomic nervous system ,