2.2. Intervention
The intervention consisted of 12 mindfulness-based IM classes given twice a week from October to December 2020. Each class lasted approximately 60 min and was delivered on the Zoom video conferencing platform [Participants also received a 25 min audio recording to practice IM daily before going to sleep, to release physical and emotional tension through focused breathing and body-part relaxation. In addition, they received general non-mandatory dietary advice and recommendations from a nutritionist aimed at promoting healthy sleep. In particular, the consumption of tryptophan-containing food (e.g., legumes, dairy products, whole grain, etc.) was recommended [