Fig. 2From: Impact of Exercise in Hypoxia on Inflammatory Cytokines in Adults: A Systematic Review and Meta-analysisForest plot of the effects of exercise in hypoxia compared to normoxia on IL-6. Data are reported as SMD (95% confidence limits). SMD: standardized mean difference; Wahl et al. 2013 A [52]: exercise at 2000 m; Wahl et al. 2013 AA [52]: exercise at 4000 mBack to article page