Oxygenation Threshold Derived from Near-Infrared Spectroscopy: Reliability and Its Relationship with the First Ventilatory Threshold

van der Zwaard, Stephan; Jaspers, Richard T.; Blokland, Ilse J.; Achterberg, Chantal; Visser, Jurrian M.; den Uil, Anne R.; Hofmijster, Mathijs J.; Levels, Koen; Noordhof, Dionne A.; de Haan, Arnold; de Koning, Jos J.; van der Laarse, Willem J.; de Ruiter, Cornelis J.

doi:10.1371/journal.pone.0162914

Oxygenation Threshold Derived from Near-Infrared Spectroscopy: Reliability and Its Relationship with the First Ventilatory Threshold

BACKGROUND: Near-infrared spectroscopy (NIRS) measurements of oxygenation reflect O2 delivery and utilization in exercising muscle and may improve detection of a critical exercise threshold. PURPOSE: First, to detect an oxygenation breakpoint (Δ[O2HbMb-HHbMb]-BP) and compare this breakpoint to ve…