The COVID-19 pandemic is an exceptional and particularly anxiety-provoking health situation. In particular, for healthcare professionals who come into contact with patients who are contaminated or suspected of contamination, such as emergency rooms. The management of these patients requires reinforced protective equipment. However, in the context of this pandemic, data is currently non-existent on the objective measurement of the stress of these professionals. Sinus variability of heart rate is a biomarker of stress measured with a simple heart rate monitor or a watch, completely painless, non-intrusive, and used by the general public routinely in many areas (monitoring sports sessions, etc.).

This is an observational study. In the emergency room, each participant will wear a heart rate monitor and a consumer watch throughout the working day (there will be no measurement on duty at night, nor measurement at home). The days will be notified as being in the "COVID sector", "non-COVID sector" or "Trauma Room".

Each participant will complete a questionnaire comprising visual analog scales on the feeling (health concern, stress, fatigue, quality of sleep, anxiety, morale, burnout, decisional latitude, psychological demand, support, self-esteem), time of start and end of work, and socio-demographic data (sex, age, weight, height, smoking)

Inclusion Criteria:

• Emergency health care worker

Exclusion Criteria:

• refusal to participate

Emergency health care worker