Augmentation index (AIx), augmentation index adjusted to 75 beats/min (AIx@75), augmentation pressure (AP), and pulse pressure (PP) pre- (Pre) and postsitting (post) in normal ambient conditions (PSIT) and mild hypercapnic conditions (HCAP). A: AIx was significantly decreased following sitting; however, there was no significant difference between conditions (n = 12). B: AIx@75 was significantly decreased following sitting; however, there was no significant difference between conditions (n = 12). C: AP was significantly decreased following sitting; however, there was no significant difference between conditions (n = 12). D: PP was unchanged following sitting in either condition (n = 12). Values are means ± SE. *P < 0.05 vs. Pre.