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Effect of acute intermittent hypoxia (IH) on sympathetic nervous system activity during quiet normoxic rest. A: firing once per burst. B: firing more than once per burst. Data are reported as means ± SE from n = 17 (11 male/6 female) participants. The effect of relative cluster size (10–100% of total clusters) and IH (pre-IH, post-IH) and the interaction of cluster and IH were assessed using a two-way repeated measures ANOVA. *P < 0.05 vs. pre-IH.
