Two daily practices beat a rotating mindfulness menu for lasting stress relief — in one distance-learning trial

What the researchers did

Bock, Hägerbäumer, Riedel, and Rana ran a randomised trial with students at a German distance-learning university. They compared two self-paced web programs plus a wait-list control.

Mind2Full rotated a broad set of mindfulness techniques (new exercise daily). ComGrat repeated two core practices — self-compassion and gratitude — every day. The authors designed ComGrat with cognitive load theory (fewer extra details) and spaced repetition (the same material revisited). Both lasted 28 days.

They measured mindfulness, self-compassion, and perceived stress at baseline, right after the month, and at three-month follow-up. 167 people were randomised; the main complete-case analysis used 98 (~30 / 31 / 37 per arm; mean age about 36; about 87% women; most also employed). The wait-list received a program after the post-test, so three-month comparisons versus an untreated control are not available.

What they found

• Right after the month, both programs raised mindfulness versus control (Mind2Full +0.59, ComGrat +0.43 on the CHIME scale; both p < 0.001). Control barely moved.
• Perceived stress fell in both active arms at post-test (about 0.43 and 0.38 points on the stress questionnaire). The time × group interaction was moderate (ηp² = 0.12).
• At three months, ComGrat’s stress scores stayed close to the post-test gain (2.94 → 2.56 → 2.57); Mind2Full drifted back up (2.91 → 2.48 → 2.70). Within-arm, ComGrat also held more of its mindfulness gain.
• Self-compassion improved within both programs at post-test, but those gains were not clearly larger than control in between-group tests, and they faded by follow-up.

What this means for learners and educators

• If you already juggle work, family, and an online degree, a short, repeating pair of practices may stick better than a crowded wellness curriculum.
• Course designers can treat wellbeing drills like study: fewer items, revisited on a schedule, instead of a new technique every login.
• This is not a claim that mindfulness replaces sleep, workload cuts, or counselling — it is one self-guided month in one school.

Limitations and what we don't know yet

41% of randomised people were dropped as outliers plus missing follow-ups before the main ANOVA (69 / 167). The authors say intention-to-treat models on all 167 kept the same pattern with smaller effects — still a large hole. The sample is heavily female and one institution. There is no untreated control at three months. Measures are self-report, not grades. Daily repetition here is not the same as expanding-interval flashcards.

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