Mindfulness For Life (MBCT-L) is an adapted version of Mindfulness-Based Cognitive Therapy, designed for the general population. While rooted in the original MBCT program, which was developed for preventing depressive relapse, Mindfulness for Life is tailored to increase the levels of psychological well-being, emotional resilience and mental health outcomes in non-clinical populations.

The program consist of 8 weekly sessions of 2 hours and 15 minutes, complemented by guide daily home practice. Participants are taught mindfulness meditation practices, cognitive-behavioral strategies, and experiential exercises aimed at enhancing self-awareness and emotional regulation. The intervention follows the standardized 'Mindfulness for Life' curriculum, as developed by the Oxford Mindfulness Foundation (OMF), and is delivered by an instructor trained in the approach through OMF.

Participants in the wait-list control group will not receive the intervention during the initial study period but will be offered access to the Mindfulness for Life (MBCT-L) program after the initial phase of the study ends. For the first 8 weeks, they will not receive any structured psychological intervention as part of the study. They will continue any usual care or personal routines, an they will complete the same assements at equivalent time points.

After this initial waiting period and completion of the first follow-up assessment, participants will then begin the Mindfulness for Life (MBCT-L) program.

This is the second phase of a two-period crossover study. During this phase, participants assigned to the wait-list control condition do not receive any psychological intervention or active treatment. They continue with their usual activities and complete outcome assessments. In Phase 1 of the trial, the participants assigned to this group received the MBCT-L interventions.

MBCT-L (Mindfulness-Based Cognitive Therapy for Life) Is a structered, group-based intervention developed for use with healthy adults. The programs runs for 8 consecutive weeks, with sessions lasting 2 hours and 15 minutes. It includes formal and informal mindfulness practices, exercises to develop cognitive and emotion awareness, with elements adapted from cognitive therapy. The course was designed to support participants in cultivating habits that increase emotion regulation and psychological well-being. Home practice is assigned daily using audio-guided meditations. The intervention is standardized and delivered by a instructor trained under Oxford Mindfulness Centre (OMC) protocols. MBCT-L is distinct from the clinical MBCT model used for relapse prevention. And it is also disting from other Mindfulness-Based interventions as it uses different exercises than, for example, Mindfulness-Based Stress Reduction which emphasis stress theories in the intervention.

This scale is used to measure daily changes in state mindfulness. Participants will self-report levels of acting with awareness, nonjudgemental acceptance and present-moment attention in the context of their work day. The Multidimensional State Mindfulness Questionnaire (MSMQ) includes 9 items, rated on a Likert-type scale, and is designed to capture mindfulness as it fluctuates over time. Data will be collected across three daily diary periods: a baseline period before any intervention, a second period following the first 8-week phase, and a final period conducted after the second 8-week phase, once the crossover is complete. This structure allows for the examination of both between-group and within-subject changes in state mindfulness associated with the intervention.

The Metacognitive Processes of Decentering is a brief self-report measure designet to assess momentary decentering. The capacity to observe thoughts and emotions with perspective and distance from one's experience. The current implementations includes two items: "I can watch my thoughts and emotions come and go like clouds" and "I am more than my thoughts and feelings," rated on a Likert scale. The third decentering item was omitted to preserve conceptual compatibility with related constructs. The scale will be used in three periods of daily diary thought the study, first one after interventions, post-interventions phase 1, and at the end of the study after the crossover is complete.