Can Time Efficient Exercise Improve Cardiometabolic Risk Factors in Type 2 Diabetes? A Pilot Study
Journal article, Peer reviewed
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http://hdl.handle.net/11250/2394823Utgivelsesdato
2016Metadata
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Originalversjon
Journal of Sports Science and Medicine (JSSM) 2016, 15(2):308-313Sammendrag
Exercise is considered a cornerstone in the prevention and
treatment of type 2 diabetes, but few individuals with type 2
diabetes exercise according to guidelines. We investigated the
effect of two time efficient high intensity exercise interventions
on exercise capacity, glycemic control and other cardiometabolic
risk factors in patients with type 2 diabetes. Twenty-one
individuals with type 2 diabetes were randomly assigned to low
volume high intensity interval exercise (HIIE; 27 minutes/bout;
10x1-minute at 90 % of HRmax; n = 10) or extremely low volume
sprint interval exercise (SIE; 10 minutes/bout; 2x20 seconds
at maximum achievable intensity; n = 11) 3 days/week for
12 weeks. Aerobic exercise capacity (VO2peak), glycosylated
hemoglobin (HbA1c), blood pressure and body composition were
measured at baseline and post test. Both HIIE and SIE improved
VO2peak (3.3 mL∙min-1∙kg-1, 10.4 %), p < 0.01, and 1.4 mL∙min-
1∙kg-1 (4.6 %), p = 0.03, respectively). Only HIIE reduced body
fat percentage (4.5 %, p = 0.04) and two minute heart rate recovery
(11.0 bpm, p = 0.02). Neither HIIE nor SIE improved
HbA1c. In conclusion, this study indicates that substantially
lower exercise volumes than recommended in current guidelines
can improve aerobic exercise capacity in individuals with type 2
diabetes. However, 12 weeks of time efficient high intensity
exercise did not improve glycemic control, and interventions of
longer duration should be investigated.