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Effects of the cognitive task on heart rate (a), rMSSD (b), and SDNN (c) as a function of block and group. # (p < .001), * (p < .05), Significant main effect of group. $ (p < .001), Significant main effect of block. £ (p < .05), Significant group‐by‐block interaction effect. Data presented as M ± SEM.
