Browsing by Author "George, Mitchell"

Now showing 1 - 1 of 1
  • Thumbnail Image
    ItemOpen Access
    Training Status and Not Aging Per Se, Determines the Speed of the V̇O2 Kinetics Response
    (2017) George, Mitchell; Murias, Juan; Doyle-Baker, Patricia; Reimer, Raylene; duManoir, Gregory
    At the onset of moderate-intensity exercise in humans, an increase in energetic demand stimulates an increase in oxidative phosphorylation and thus oxygen provision to the muscles. However, the adjustment of oxidative phosphorylation at the onset of exercise follows an exponential profile. Recent research has attempted to understand the extent of this adjustment in young and older humans, by investigating oxygen delivery to the active tissues. Some researchers have suggested that perhaps training status and not aging per se determines the dynamic adjustment of oxygen consumption during the exercise transition. This study attempted to understand these differences using a model of aging and training. Fifty-seven men were divided into six groups based on age and activity level. The participants underwent a ramp-incremental test, a vascular occlusion test and three moderate intensity exercise transitions. The results suggest that training and not aging per se determine the V̇O2 kinetics response.