Exercise to preserve β-cell function in recent-onset Type 1 diabetes mellitus (EXTOD) - a randomized controlled pilot trial

Article


Narendran, P., Jackson, N., Daley, A., Thompson, D., Stokes, K., Greenfield, S., Charlton, M., Curran, M., Solomon, T., Nouwen, A., Lee, S., Cooper, A., Mostazir, M., Taylor, R., Kennedy, A. and Andrews, R. 2017. Exercise to preserve β-cell function in recent-onset Type 1 diabetes mellitus (EXTOD) - a randomized controlled pilot trial. Diabetic Medicine. 34 (11), pp. 1521-1531. https://doi.org/10.1111/dme.13439
TypeArticle
TitleExercise to preserve β-cell function in recent-onset Type 1 diabetes mellitus (EXTOD) - a randomized controlled pilot trial
AuthorsNarendran, P., Jackson, N., Daley, A., Thompson, D., Stokes, K., Greenfield, S., Charlton, M., Curran, M., Solomon, T., Nouwen, A., Lee, S., Cooper, A., Mostazir, M., Taylor, R., Kennedy, A. and Andrews, R.
Abstract

AIM:
Residual β-cell function is present at the time of diagnosis with Type 1 diabetes. Preserving this β-cell function reduces complications. We hypothesized that exercise preserves β-cell function in Type 1 diabetes and undertook a pilot trial to address the key uncertainties in designing a definitive trial to test this hypothesis.
METHODS:
A randomized controlled pilot trial in adults aged 16-60 years diagnosed with Type 1 diabetes within the previous 3 months was undertaken. Participants were assigned to control (usual care) or intervention (exercise consultation every month), in a 1 : 1 ratio for 12 months. The primary outcomes were recruitment rate, drop out, exercise adherence [weeks with ≥ 150 min of self-reported moderate to vigorous physical activity (MVPA)], and exercise uptake in the control group. The secondary outcomes were differences in insulin sensitivity and rate of loss of β-cell function between intervention and control at 6 and 12 months.
RESULTS:
Of 507 individuals who were approached, 58 (28 control, 30 intervention) entered the study and 41 completed it. Participants were largely white European males, BMI 24.8 ± 3.8 kg/m2 , HbA1c 75 ± 25 mmol/mol (9 ± 2%). Mean level of objectively measured MVPA increased in the intervention group (mean 243 to 273 min/week) and 61% of intervention participants reached the target of ≥ 150 min/week of self-reported MVPA on at least 42 weeks of the year. Physical activity levels fell slightly in the control group (mean 277 to 235 min of MVPA/week). There was exploratory evidence that intervention group became more insulin sensitive and required less insulin. However, the rate of loss of β-cell function appeared similar between the groups, although the change in insulin sensitivity may have affected this.
CONCLUSION:
We show that it is possible to recruit and randomize people with newly diagnosed Type 1 diabetes to a trial of an exercise intervention, and increase and maintain their exercise levels for 12 months. Future trials need to incorporate measures of greater adherence to exercise training targets, and include more appropriate measures of β-cell function.

Research GroupApplied Health Psychology group
LanguageEnglish
PublisherWiley
JournalDiabetic Medicine
ISSN0742-3071
Publication dates
Online14 Sep 2017
Print01 Nov 2017
Publication process dates
Deposited12 Feb 2018
Accepted22 Jun 2017
Output statusPublished
Accepted author manuscript
Copyright Statement

This is the peer reviewed version of the following article: Narendran, P. et al., 2017. Exercise to preserve β-cell function in recent-onset Type 1 diabetes mellitus (EXTOD) - a randomized controlled pilot trial. Diabetic Medicine, 34(11), pp.1521–1531, which has been published in final form at http://dx.doi.org/10.1111/dme.13439. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

Digital Object Identifier (DOI)https://doi.org/10.1111/dme.13439
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