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Randomized Controlled Trial
. 2015 Aug 25:12:105.
doi: 10.1186/s12966-015-0266-5.

Adoption and maintenance of gym-based strength training in the community setting in adults with excess weight or type 2 diabetes: a randomized controlled trial

Megan Teychenne  1 , Kylie Ball  2 , Jo Salmon  3 , Robin M Daly  4 , David A Crawford  5 , Parneet Sethi  6 , Michelle Jorna  7   8 , David W Dunstan  9   10   11   12   13
Affiliations
Randomized Controlled Trial

Adoption and maintenance of gym-based strength training in the community setting in adults with excess weight or type 2 diabetes: a randomized controlled trial

Megan Teychenne et al. Int J Behav Nutr Phys Act. .

Abstract

Background: Participant adoption and maintenance is a major challenge in strength training (ST) programs in the community-setting. In adults who were overweight or with type 2 diabetes (T2DM), the aim of this study was to compare the effectiveness of a standard ST program (SST) to an enhanced program (EST) on the adoption and maintenance of ST and cardio-metabolic risk factors and muscle strength.

Methods: A 12-month cluster-randomized controlled trial consisting of a 6-month adoption phase followed by a 6-month maintenance phase. In 2008-2009, men and women aged 40-75 years (n = 318) with T2DM (n = 117) or a BMI >25 (n = 201) who had not participated in ST previously were randomized into either a SST or an EST program (which included additional motivationally-tailored behavioral counselling). Adoption and maintenance were defined as undertaking ≥ 3 weekly gym-based exercise sessions during the first 6-months and from 6-12 months respectively and were assessed using a modified version of the CHAMPS (Community Healthy Activity Models Program for Seniors) instrument.

Results: Relative to the SST group, the adjusted odds ratio (OR) of adopting ST for all participants in the EST group was 3.3 (95 % CI 1.2 to 9.4). In stratified analyses including only those with T2DM, relative to the SST group, the adjusted OR of adopting ST in the EST group was 8.2 (95 % CI 1.5-45.5). No significant between-group differences were observed for maintenance of ST in either pooled or stratified analyses. In those with T2DM, there was a significant reduction in HbA1c in the EST compared to SST group during the adoption phase (net difference, -0.13 % [-0.26 to -0.01]), which persisted after 12-months (-0.17 % [-0.3 to -0.05]).

Conclusions: A behaviorally-focused community-based EST intervention was more effective than a SST program for the adoption of ST in adults with excess weight or T2DM and led to greater improvements in glycemic control in those with T2DM.

Trial registration: Registered at ACTRN12611000695909 (Date registered 7/7/2011).

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Figures

Fig. 1
Fig. 1
STRONG participant flowchart
Fig 2
Fig 2
Forrest plot showing odds ratio of adherence to strength training at 2-, 4-, 6- and 12- months*. * based on the mixed model with random effects; Adherence = ≥3 sessions per week. ‡ p < 0.05 difference between the Enhanced and Standard ST group
See this image and copyright information in PMC

References

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