Table 1.

Comprehensive overview of the recent literature on mindfulness training.

Author	Title	Objectives and Method	Main Findings
Bartlett et al. (2019) [17]	A systematic review and meta-analysis of workplace mindfulness training randomized controlled trials.	This meta-analytic review examines the current literature and public domains regarding the benefits of workplace mindfulness training.	The results of the review indicate beneficial effects due to the training for mindfulness, stress, anxiety, psychological distress, and for well-being and sleep.
El Morr et al. (2020) [24]	Effectiveness of an 8-Week Web-Based Mindfulness Virtual Community Intervention for University Students on Symptoms of Stress, Anxiety, and Depression: Randomized Controlled Trial	In a randomized controlled trial this study assess the effectiveness of an 8-week web-based mindfulness and cognitive behavioral therapy program. It is examined how well the programm reduces symptoms of depression, anxiety, and stress and increases mindfulness. N = 160 undergraduate students.	The study found that depression and anxiety symptoms were significantly reduced and that mindfulness scores were significant increase, but it did not find a significant effect on perceived stress.
Johnson et al. (2020) [19]	Mindfulness training in the workplace: exploring its scope and outcomes	This integrative literature review was conducted in order to compare and contrast relevant articles and information as well as create new knowledge and point out new research directions on mindfulness practices in work settings.	The review compares 28 empirical studies and concludes that mindfulness-based training is an effective intervention for organizations to improve mental health, wellbeing and performance of employees.
Kersemaekers et al. (2018) [21]	A Workplace Mindfulness Intervention May Be Associated with Improved Psychological Well-Being and Productivity. A Preliminary Field Study in a Company Setting	The study examines the feasibility and effectiveness of a Workplace Mindfulness Training in regards to burnout, psychological well-being, organizational and team climate, and performance. The constructs were measured by 425 participants up to a month before, at start of, and right at the end of a Workplace Mindfulness Training.	Comparing the intervention period with the pre-intervention period significantly greater improvements were found in terms of burnout, perceived stress, the Mindfulness Attention Awareness Scale (MAAS), and well-being.
Ma et al. (2018) [25]	Effectiveness of Online Mindfulness-Based Interventions on Psychological Distress and the Mediating Role of Emotion Regulation	The study examines the effects of eight weeks online mindfulness-based programs in terms of psychological distress (depression and anxiety). 76 participants were deived ramdomely into four groups: group mindfulness-based intervention (GMBI), self-direct mindfulness-based intervention (SDMBI), discussion group (DG) and a control group (BCG) who all completed a pre- and post-test.	Significant pre- and post-test differences in terms of mindfulness, emotion regulation difficulties, and psychological distress were seen in the GMBI and SDMBI group.
Nadler et al. (2020) [26]	Online Mindfulness Training Increases Well-Being, Trait Emotional Intelligence, and Workplace Competency Ratings: A Randomized Waitlist-Controlled Trial	The study examines the effectiveness of an online 8-week mindfulness-based training program through a randomized waitlist-controlled trial in a sample of 102 adults employed fulltime at a Fortune 100 company.	The intervention group showed statistically significant decreases in stress and negative mood and significant increases in resilience, and positive mood. The study argues that an online-based mindfulness training program enhances well-being, self-perceptions of emotional intelligence, and workplace performance.
Pérez-Fuentes (2020) [20]	Mindfulness for Preventing Psychosocial Risks in the Workplace: A Systematic Review and Meta-Analysis	The Review and Meta-Analysis examines the findings on the efficacy of MBIs on psychological variables in the workplace published from 2009 to 2019. Out of 468 articles 24 studies were included in the systematic review and meta-analysis.	The result of the meta-analysis argues that organizational interventions in mindfulness positively influence psychological variables related to employee health and wellbeing, and recommends further research to confirm this finding.
Querstret et al. 2018) [27]	The Effects of an Online Mindfulness Intervention on Perceived Stress, Depression and Anxiety in a Non-clinical Sample: A Randomised Waitlist Control Trial	The study examines the effects of an 4-week online mindfulness intervention in terms of perceived stress, depression and anxiety, as well as different facets of mindfulness. 118 adults were randomised to either an intervention (INT) or waitlist control (WLC) group. Participants were encouraged to complete the course within 4 weeks. The constructs were assessed at baseline, post-treatment, 3- and 6-month after the treatment.	Participants of the mindfulness-based intervention reported significantly lower levels of perceived stress, anxiety and depression compared with waitlist control participants. The effects were maintained at follow-up.
Sommers-Spijkerman et al. (2021) [29]	New Evidence in the Booming Field of Online Mindfulness: An Updated Meta-analysis of Randomized Controlled Trials	The meta-analysis conducts a systematic literature search up to December 2020 on the effects of online mindfulness based interventions on mental health and the potential moderators of these effects. The analysis includes 97 trials. Pre-to-post and pre-to-follow-up were calculated in terms of depression, anxiety, stress, well-being, and mindfulness using a random effects model.	The meta-analysis found a statistically significant moderate pre-to-post effects on depression stress, and mindfulness and small effects on anxiety. For well-being, a significant small effect was found only when omitting outliers or low-quality studies. Significant but small follow-up effects were found for depression and anxiety.
Zhang et al. (2020) [28]	A Meta-Analysis: Internet mindfulness-based interventions for stress management in the general population	The meta-analysis conducts a systematic literature search up to April 2019 on the effects of internet mindfulness based interventions for stress reduction in the general population. 16 Studies were included in the analysis.	The meta-analysis indicated that internet mindfulness based interventions had small to moderate effects on stress and mindfulness compared with the control group.