Stress in the collective: Psychophysiological reactivity to an orchestra concert as a collective naturalistic, real-life stressor of psychosocial nature

The investigation of collective stress experiences, including collective stressors and the psychophysiological reactivity of a collective to these stressors, has been widely neglected so far. Here, we examined public non-professional orchestra concerts as collective psychosocial, naturalistic, real-life stressors and the resulting psychophysiological reactivity in a collective of non-professional orchestra musicians. The members of two non-professional music orchestras (N = 54) were accompanied during a public concert (stress condition) and a rehearsal (control condition). We repeatedly assessed heart rate, salivary cortisol, and excitement levels before, during, and after the concert/rehearsal in addition to the anticipatory cognitive stress appraisal. We observed greater physiological reactivity to the concert compared to the rehearsal (p's ≤.017), with higher increases in HR levels in anticipation of and in reaction to the concert and in cortisol levels in reaction to the concert compared to the rehearsal. Moreover, orchestra members reported greater psychological reactivity to the concert than to the rehearsal (p's ≤.024) in terms of higher cognitive stress appraisal in anticipation and increased excitement levels before and during the concert compared to the rehearsal. Our findings indicate that orchestra concerts by non-professional individuals constitute collective naturalistic, real-life stressors of psychosocial nature, resulting in significant psychophysiological stress responses with reactivity kinetics differing between sympathetic-adrenal-medullary axis, hypothalamic-pituitary-adrenal axis, and the psychological response. Potential implications and modulating factors need to be elucidated in future studies.