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Spinal Cord Injury and Cardiovascular Health: Effect of Arm Crank Exercise at Aerobic High and Moderate Intensity - A pilot study

Sørhøy, Bodil
Master thesis
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masteroppgaveBodilSørhøy.pdf (961.1Kb)
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http://hdl.handle.net/11250/281448
Utgivelsesdato
2014
Metadata
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  • Institutt for samfunnsmedisin og sykepleie [1706]
Sammendrag
Background: Cardiovascular disease (CVD) is now the leading cause of death in individuals

with spinal cord injury (SCI). The SCI population is among the least physically active in

society. Physical activity is known to reduce risk factors for CVD. The role of intensity of

aerobic arm exercise in individuals with a chronic SCI is not fully investigated. Purpose: To

compare the effects from aerobic high intensity interval training (HIT) (85% - 95% of peak

heart rate (HR

peak

)) and isocaloric aerobic continuous moderate exercise (CME) (70% of

HRpeak

) on peak oxygen uptake (VO2peak

), waist circumference (WC) and endothelial function

measured as flow-mediated dilatation (FMD) in the brachial artery. Methods: 10 individuals

with SCI paraplegia were randomized to HIT or CME arm crank exercise three times a week

for eight weeks. Results: No significant differences in VO

2peak

between the groups from

baseline to post-test were found. However, there was a favorable trend towards a higher

increase in VO

2peak

in the HIT group compared to the CME group, 28.1±7.5 ml∙ kg

-1

∙min

-1

-31.2±8.8 ml∙ kg

-1

∙min

-1

versus 24.6±6.9 ml∙ kg

-1

∙min

-1

- 23.8±5.4 ml∙ kg

-1

∙min

-1

, respectively,

(P= 0.051). No difference in FMD or WC within or between the groups from baseline to posttest was found. Conclusions: The findings from the present pilot study showed no significant

difference between high- and moderate intensity arm crank exercise in terms of VO

2peak

, waist

circumference or flow-mediated dilatation. However, there was a favorable trend towards a

higher increase in VO

2peak

from arm crank exercise at aerobic high intensity compared to

isocaloric exercise at moderate intensit y. Exercise at aerobic high intensity was feasible for

the individuals with SCI paraplegia in this study. Future randomized studies with larger

sample sizes to confirm our findings are needed.

Relevance:

Evidence based practice is essential to assure the best possible quality of rehabilitation

medicine, and in this case, for the cardiovascular health of individuals with SCI paraplegia.

The findings from the present study may be incorporated into daily treatment routines, and

will contribute with new knowledge in the development of exercise guidelines for the SCI

population.
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