Delfinansiering av phd
Spinal cord injured individuals improve VO2peak and stroke volume after aerobic high intensity interval hybrid training.Abstract Study design: Baseline control trial. Objectives: To determine the cardiovascular effects of 8 weeks of aerobic high intensity interval training 4 times 4 minutes from combined arm cycling and functional electrical stimulation (FES) leg cycling (hybrid exercise) for spinal cord injured (SCI) individuals. Setting: Outpatients SCI clinic at St. Olav’s University Hospital, Norway. Methods: 6 male SCI individuals volunteered for Hybrid exercise 3 times a week for 8 weeks preceded by a 7 week control period. Results: No significant changes were observed in the control period. The ability to utilise oxygen maximally increased by 30% from 24.7(10.51) to 32.1 (13.5) mL ·kg-1?min-1 from pre- to post- test (p =0.031) in the training period using a hybrid training protocol. A significant improvement in stroke volume of the heart and cardiac output measured and calculated during hybrid cycling by 36.4% from 78.0 (9.9) to 106.4 (46.7) mL·beat-1 and 31% from 12.90(5.75) to 16.90(7.60) L· min-1 respectively. Separate VO2peak tests for arm cycling and FES cycling increased by 25.9% (p=0.031) and 30% (p=0.031) respectively. Conclusions: 8 weeks of training aerobic high intensity hybrid intervals at 85-95% of peak watt significantly improve VO2peak and peak stroke volume in SCI individuals. As maximal oxygen uptake is directly linked to health, cardiovascular disease and mortality, the present study may be useful for designing effective training programs sufficient to improve health and reverse the risk of cardiovascular disease in SCI individuals.
Jan Hoff, Berit Brurok, Trine Karlsen, Gunnar Leivseth, Jan Helgerud
Spinal cord injured individuals improve VO2peak and stroke volume after aerobic high intensity interval hybrid training
American College of Sports Medicine, Konferanse i Seattle, 2009