Background: This exploratory, non-randomized pre–post study compares three school-based stress interventions—Yoga, Climbing, and Social–Emotional Learning—in primary school children. Methods: We compared three low-threshold interventions delivered during regular lessons: (1) a six-week video-guided Yoga sequence (
n = 64; grade 3), (2) a 2.5-week
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Background: This exploratory, non-randomized pre–post study compares three school-based stress interventions—Yoga, Climbing, and Social–Emotional Learning—in primary school children. Methods: We compared three low-threshold interventions delivered during regular lessons: (1) a six-week video-guided Yoga sequence (
n = 64; grade 3), (2) a 2.5-week social–emotional learning (SEL) module focused on emotion recognition and regulation (
n = 60; grade 3), and (3) a two-week Climbing program implemented with a small special-education sample (
n = 12). Parallel class-matched controls were included for Yoga and SEL (
n = 64 and
n = 60, respectively). A quasi-experimental pre–post design was used. Primary outcomes were overall stress and the emotion subdomains of anger, anxiety, and sadness (SSKJ 3–8); the secondary outcome for the Climbing pilot was general self-efficacy (SWE). Non-parametric statistics (Wilcoxon signed-rank, Mann–Whitney U) and rank-biserial effect sizes (r) were reported with Holm-adjusted α = 0.05. Results: Yoga and SEL produced significant within-group reductions in overall stress and all emotional subdomains (all
p < 0.001; r = 0.59–0.75) and outperformed their respective controls at post-test (
p ≤ 0.038; r = 0.22–0.48). Change-score comparisons between Yoga and SEL were not statistically different (
p ≥ 0.44). In the exploratory Climbing group, self-efficacy increased significantly (V = 64.5,
p = 0.006, r = 0.80); stress outcomes mirrored Yoga/SEL trends but were under-powered. Conclusions: A brief classroom Yoga routine and a condensed SEL module each yielded clinically meaningful reductions in stress among primary-school pupils, offering flexible options for post-pandemic recovery. Preliminary evidence suggests that Climbing may enhance self-efficacy in older students with psychological challenges; however, larger samples are required. Integrating cost-effective physical and emotional strategies can help schools promote resilience and well-being amid ongoing educational disruptions.
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