Longer Bouts of Intermittent Hypoxia Coupled with Increased Levels of Sustained Hypercapnia Lead to Increases in the Magnitude of Ventilatory Long-Term Facilitation in African Americans Compared to Caucasians.

vLTF was evident following the completion of both protocols. However, the magnitude of vLTF was greater after P2. Likewise, the magnitude of vLTF was greater in African Americans compared to Caucasians following P2. Our data indicate that the magnitude of LTF may be impacted by race, particularly if longer bouts of intermittent hypoxia coupled to a higher sustained level of carbon dioxide is employed.