Home-based exercise for middle-aged Chinese at diabetic risk: a randomized controlled trial

Area of Science:

• Exercise science
• Metabolic health
• Preventive medicine

Background:

• Middle-aged adults with diabetic risk factors often experience declining physical activity and worsening metabolic health.
• Adiponectin, a key metabolic hormone, is often reduced in individuals at risk for type 2 diabetes.
• Home-based exercise interventions are a potential strategy to improve health outcomes in this population.

Purpose of the Study:

• To assess the short-term (3 months) and long-term (9 months) effects of a home-based exercise program.
• To investigate the impact on adiponectin levels, exercise behavior, and metabolic risk factors.
• To evaluate the sustainability of these effects in middle-aged adults at risk for type 2 diabetes.

Main Methods:

• A randomized controlled trial involving 135 middle-aged adults with at least one diabetic risk factor.
• Participants were assigned to either a home-based exercise group or a usual care control group.
• Outcome measures included plasma adiponectin, exercise self-efficacy, physical activity, body mass index, insulin resistance (HOMA-IR), physical fitness, and metabolic syndrome components.

Main Results:

• The exercise group showed significant improvements in exercise self-efficacy, body mass index (BMI), and flexibility at 3 months, with BMI and flexibility maintained at 9 months.
• Physical activity significantly increased in the exercise group and decreased in the control group by 9 months.
• No significant effects were observed on adiponectin levels or other measured metabolic risk factors over the 9-month period.

Conclusions:

• Home-based exercise effectively enhances exercise behavior and improves specific metabolic risk factors like BMI and flexibility in individuals at risk for type 2 diabetes.
• These positive behavioral and physiological changes are sustainable for at least 9 months.
• The intervention did not significantly alter adiponectin levels, suggesting this specific biomarker may not be responsive to this type of exercise program in this population.