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The aim of this Phase II Clinical Trial is to demonstrate the efficacy of social cognitive theory (SCT) based intervention for initiating, and most importantly, maintaining resistance training in older adults with pre-diabetes (i.e., impaired glucose tolerance or impaired fasting glucose) to improve blood glucose regulation.
The aim of this Phase II Clinical Trial is to demonstrate the efficacy of social cognitive theory (SCT) based intervention for initiating, and most importantly, maintaining resistance training in older adults with pre-diabetes (i.e., impaired glucose tolerance or impaired fasting glucose) to improve glucose homeostasis. The overall aim is consistent with NIDDK's Behavioral/Prevention Research Program's focus on individual, family, and community-based strategies for prevention of diabetes and its complications. Resistance training is particularly applicable to older, pre-diabetic adults given the loss of lean body mass and worsening of glucose tolerance with aging. The proposed research program evaluates a 15-month SCT based intervention for maintenance of resistance training with older adults. Men and women 50-69 (N=180) with pre-diabetes, defined as exhibiting either impaired glucose tolerance (IGT; 2-h glucose 140-199 mg/dl) or impaired fasting glucose (IFG; 100-125 mg/dl), will first follow the same standard, supervised 3-month initiation period with resistance training. All people completing the Initial Phase will be randomly assigned to 1 of 2 maintenance conditions: 1. a long-term SCT based, ASPIRE intervention, emphasizing self-regulation and other SCT strategies to optimize training, with faded contact; 2. a Standard intervention with minimal contact. The primary outcome measures are indices of pre-diabetes (glucose tolerance and fasting glucose concentration) and strength. Secondary measures include adherence; ß-cell responsivity, insulin sensitivity, and disposition index, as determined by the oral glucose and C-peptide minimal model; fat free mass, other indicators of health and metabolic fitness, and SCT measures. Assessments will occur at baseline, at the end of the Initiation Phase (3 months), at the end of the different interventions (9 months) and 6 months after all contact has ended (15 months from baseline). It is hypothesized that SCT based resistance training with faded contact will produce better outcomes than the Standard-based resistance training at 9 month and 15 month assessments. It also is hypothesized that improvements in glucose homeostasis and in strength from resistance training will be mediated by adherence, self-efficacy, and use of self-regulation strategies. Resistance training has become an important component in the treatment and prevention of diseases and disabilities, and especially so for Type 2 diabetes. Critical to public health and a focus of NIDDK are theory-based interventions that enable, effective long-term resistance training with minimal supervision after an initiation phase and where improvements in adherence and outcomes are facilitated by theoretical constructs.
Allocation: Randomized, Control: Active Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Prevention
SCT-based Resistance Training exercise program, Standard Intervention with minimal contact
Not yet recruiting
Virginia Polytechnic Institute and State University
Published on BioPortfolio: 2014-08-27T03:14:06-0400
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A type of strength-building exercise program that requires the body muscle to exert a force against some form of resistance, such as weight, stretch bands, water, or immovable objects. Resistance exercise is a combination of static and dynamic contractions involving shortening and lengthening of skeletal muscles.
Alternating sets of exercise that work out different muscle groups and that also alternate between aerobic and anaerobic exercises, which, when combined together, offer an overall program to improve strength, stamina, balance, or functioning.
A cardiovascular exercise strategy with alternating short periods of intense anaerobic exercise with less-intense recovery periods.
The exercise capacity of an individual as measured by endurance (maximal exercise duration and/or maximal attained work load) during an EXERCISE TEST.
Controlled physical activity, more strenuous than at rest, which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used. The intensity of exercise is often graded, using criteria such as rate of work done, oxygen consumption, and heart rate.
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