Article

The aim of this study was to determine the effect of high-intensity
interval training during combined arm cycling exercise (ACE) and functional
electrical stimulation leg cycling (hybrid exercise), on peak stroke volume and
peak oxygen consumption in individuals with spinal cord injury (SCI). DESIGN: A
baseline control trial at an outpatient SCI clinic (St. Olav's University Hospital, Norway) was conducted. Participants included six men with SCI in stable
neurologic recovery (ASIA Impairment Scale grade A).
The study intervention
included aerobic high-intensity hybrid exercise training three times a week for 8
wks preceded by a 7-wk control period of regular daily activity. Main outcome
measures were peak stroke volume during hybrid cycling and peak oxygen
consumption during hybrid cycling, ACE, and functional electrical stimulation leg
cycling. The tests were conducted at three time points: 1, baseline; 2, control;
and 3, post-training. RESULTS: Data are presented as mean (SD). From control to
post-training tests, a significant increase in peak stroke volume by 33% (P =
0.004), from 77.7 (9.9) to 103.4 (17.1) ml/beat, was found. Furthermore, between
control and post-training tests, hybrid peak oxygen consumption increased by
24.4%, from 24.6 (3.9) to 30.6 (5.2) ml kg (-1) min (-1) (P = 0.003), and peak
oxygen consumption during isolated ACE and functional electrical stimulation
cycling increased by 25.9% (P = 0.001) and 23.5% (P = 0.007), respectively.
CONCLUSIONS: Training aerobic high-intensity hybrid intervals at 85%-95% of peak
Watt was feasible for this group of SCI men and significantly increased peak
stroke volume and peak oxygen uptake. Because aerobic capacity is directly linked
to mortality and morbidity, the present study may be useful for designing
training programs sufficient to reverse the risk of cardiovascular disease in SCI.

Langue : ANGLAIS