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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Exp Physiol. 2011 Oct 14;97(1):39–50. doi: 10.1113/expphysiol.2011.057554

Figure 3. Influence of increasing central blood volume on carotid baroreflex resetting during dynamic exercise in humans.

Figure 3

Carotid baroreflex-mean arterial pressure stimulus-response curves are presented at rest in the upright (UP) and supine (SU) positions as well as during cycling exercise under control (upright cycling at 60 revolutions per minute (rpm); UP EX60), supine cycling at 60 rpm (SU EX60), and upright cycling exercise at 80 rpm (UP EX80). All bouts of exercise were performed at the same oxygen consumption in an attempt to maintain similar central command and exercise pressor reflex activation. As discussed in detail in the text, increasing central blood volume, by changing subject posture from the upright to supine position and by increasing pedal frequency from 60 to 80 rpm to enhance the muscle pump, reduced the magnitude of exercise-induced increases in blood pressure and carotid baroreflex resetting during cycling exercise. (Adapted from Ogoh et al. 2007a.)