Improving diabetes outcomes through lifestyle change--A randomized controlled trial
Related Experiment Video
Updated: Apr 5, 2026

Author Spotlight: Exploring the Impact of Reduced Resistance Exercise Volume on Metabolic Health
Published on: December 1, 2023
Linda M Delahanty1,2, Kristen M Dalton1, Bianca Porneala3
1Department of Medicine, Massachusetts General Hospital Diabetes Center, Boston, Massachusetts, USA.
Objective:
To compare a diabetes group lifestyle intervention (GLI) with dietitian referral for medical nutrition therapy (RD) for weight loss in the usual care setting.
Methods:
Randomized clinical trial was conducted with 57 primary care patients with type 2 diabetes and body mass index (BMI) >25 kg/m(2) who received either a dietitian-led 19-week GLI adapted from the Look AHEAD study or RD. Outcome measures include 6-month and 1-year weight loss, changes in medications, glycemic control, cardiac risk factors, and cost analysis.
Results:
Patients were mean age 61, 59% male, and 32% non-white, and they weighed 97 kg with mean HbA1c 8.2%. At 6 months, 46% of GLI vs. 21% of RD lost ≥5% body weight (P = 0.04), with mean weight loss 6.6 (SD 7.0) kg with GLI and 2.1 (3.5) kg in RD (P = 0.004). HbA1c improved by 0.70 (1.13) vs. 0.39 (1.51) in GLI vs. RD (P = 0.4), respectively, and 82% vs. 38% stopped or reduced diabetes medications (P < 0.001). Weight loss remained significantly greater in GLI compared to RD at 1 year. GLI program cost was $578 per participant.
Conclusions:
An affordable GLI achieved significantly more weight loss and medication reduction than RD in primary care patients with type 2 diabetes.
Related Concept Videos
Diabetes: Management and Pharmacotherapy
Insulin remains the cornerstone of treatment for most patients with type 1 and many...
Diabetes Mellitus: Type 2 and Gestational
Diabetes Mellitus: Overview and Type I Subtype
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
Atherosclerosis III: Management
Hypertension IV: Drug Therapy and Lifestyle Modifications
Carbohydrate Metabolism
Starch accounts for approximately 60% of the carbohydrates consumed by humans. Since amylase enzymes cannot function in the stomach's acidic environment, starch can only be digested in the mouth and small intestine. Simple sugars are found naturally in milk and fruits in...

