CATEGORY: METABOLIC & BLOOD SUGAR
The researchers predicted twice the recovery they actually saw. Their program still worked. Two years into a randomized trial of 618 adults with metabolic syndrome, 27.8% of those who’d gone through a habit-focused group program no longer had the condition, compared with 21.2% of those given education and an activity tracker alone.1 Metabolic syndrome means carrying at least three of five linked risk factors: a large waistline, high blood pressure, high triglycerides, low HDL cholesterol or elevated blood sugar. Shedding it matters. The cluster pushes people toward diabetes and heart disease.
Four Habits, Nineteen Meetings
The ELM trial, run at five US sites from Chicago to Denver, didn’t hand out meal plans or targets. Groups of about fifteen met nineteen times over six months with a psychologist and a dietitian. The work centered on four daily habits: vegetables at every meal, a brisk daily walk, eating with attention to taste and fullness, and managing emotions without food. Monthly check-in meetings followed for eighteen more months. The comparison group was no afterthought. Those participants got a Fitbit, two years of monthly evidence-based tip sheets, and a call every three months. A random draw settled who landed in the groups and who got the mailings. The staff judging the outcome two years later didn’t know who’d gotten what.
A Smaller Win Than Planned, on an Honest Yardstick
The team had designed the study expecting 40% remission with the program and 20% without. The control group hit its mark almost exactly. The program group fell well short of the hope, and the authors are frank that the final margin was modest, with statistical uncertainty stretching close to no effect at all. What held up at two years was narrower. Fasting blood sugar stayed about three points lower in the program group. Participants still walked more, roughly 660 extra steps a day, and kept more vegetables on their plates. Fewer of them were taking blood pressure medication, 62.7% versus 71.5%. Waistlines, which had shrunk more in the program group at six months, had largely evened out.
Why a Modest Margin Still Says Something
Metabolic syndrome affects roughly a third of US adults, so even a six-point difference in who escapes it reaches a lot of people, with no drug involved. The trial also ran straight through the pandemic. Its in-person groups were forced online for a stretch while the mail-based comparison went untouched, a disruption the authors suspect diluted the program’s effect. What the study can’t say is whether a program this intensive, nineteen group meetings with two clinicians in the room, can be delivered widely or affordably. That question, by the authors’ own account, comes next.
Key Takeaways
- Remission of metabolic syndrome at two years reached 27.8% with a habit-based group program versus 21.2% with education and an activity tracker, a real but modest edge the authors expected to be far larger.
- Both groups improved on many measures; the program’s durable advantages were lower fasting blood sugar, more daily walking and vegetables, and less blood pressure medication use.
- The trial was single-blind with active treatment in both arms, and the program’s cost and scalability haven’t been tested.
References
- Powell LH, Berkley-Patton J, Drees BM, et al. Lifestyle Intervention for Sustained Remission of Metabolic Syndrome: A Randomized Clinical Trial. JAMA Internal Medicine. 2026;186(1):67–77. link