Table 1.

Inclusion criteria for the scoping review summarized according to the Population-Concept-Context (PCC) mnemonic, recommended for scoping reviews (Peters, 2016; Munn et al., 2018).

Population	• Healthy adults • Any sex
Concept	• In-ear measurement/monitoring of physiological parameters, i.e.,   - Temperature,   - Heart/pulse rate,   - Oxygen saturation • Comparison with measurements from other body sites.
Context	• All daily-life, non-clinical settings, with focus on physiological research, sport science, occupational medicine, and challenging environments. • Original peer-reviewed research articles (any study design), published in English in the last 10 years.