Abstract:
OBJECTIVE:To examine the effect of different levels of fractional inspired oxygen (FiO(2)) (15%, 21%, 50%) on peak oxygen consumption (VO(2)peak) during arm exercise in persons with spinal cord injury and in able-bodied controls. DESIGN:Case-control study. SETTING:University medical center in the Netherlands. PARTICIPANTS:Ten able-bodied controls, 6 persons with paraplegia, and 6 persons with tetraplegia. INTERVENTIONS:Inspiration of 15%, 21%, and 50% oxygen during a 15-minute period before and during arm exercise. MAIN OUTCOME MEASURES:Oxygen uptake (VO(2)peak, VO(2)peak/kg), power output, ventilation, and base excess. RESULTS:In the able-bodied controls, significant FiO(2) dependency was seen in power output, VO(2)peak, and VO(2)peak/kg. Persons with paraplegia showed significant FiO(2) dependency in VO(2) and VO(2)/kg. In persons with tetraplegia, no FiO(2) dependency was observed; however, VO(2) and VO(2)/kg were significantly higher at 50% than at 15% FiO(2). Ventilation and base excess did not change in able-bodied controls or in persons with paraplegia with different levels of FiO(2). In persons with tetraplegia, ventilation was significantly higher at 15% than at 50% FiO(2), and base excess did not change. No significant interactions between groups and FiO(2) were observed. CONCLUSIONS:Oxygen consumption during peak arm-cranking exercise is enhanced with an increased inspiratory oxygen fraction in able-bodied controls as well as in persons with paraplegia and to a lesser extent in persons with tetraplegia, indicating that peak oxygen consumption during arm exercise is limited by oxygen supply rather than by the small muscle mass and related biochemical limitations.
journal_name
Arch Phys Med Rehabiljournal_title
Archives of physical medicine and rehabilitationauthors
Hopman MT,Houtman S,Groothuis JT,Folgering HTdoi
10.1016/j.apmr.2003.02.001subject
Has Abstractpub_date
2004-02-01 00:00:00pages
319-23issue
2eissn
0003-9993issn
1532-821Xpii
S0003-9993(03)00888-8journal_volume
85pub_type
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