Pre-diabetes and Type 2 Diabetes: What the Evidence Says Actually Works
Written by Mia Raiff, GLP-1 Expert & Unite Fitness Retreat Nurse Practitioner Partner
Pre-diabetes and Type 2 Diabetes: What the Evidence Says Actually Works
Your doctor used the word prediabetes. Or your A1C came back higher than it should be, and you were told to lose some weight and exercise more, and that was more or less the end of the conversation.
It’s a strange place to be. Not ill, exactly, but on a trajectory — and given advice vague enough to be hard to act on.
Here’s what the research actually shows, which is considerably more encouraging than most people are told, and more specific too. This article is for general information and is not medical advice. Unite Fitness Retreat does not diagnose, treat or prescribe, and does not manage diabetes or any other condition. Do not start, stop or change any medication without consulting your prescriber.
KEY TAKEAWAYS
- In the Diabetes Prevention Program, intensive lifestyle intervention reduced the incidence of type 2 diabetes by 58% over about three years. Metformin reduced it by 31%.
- For participants aged 60 and over, lifestyle intervention reduced risk by 71%.
- The targets were smaller than most people assume: 7% of body weight and 150 minutes a week of moderate activity.
- Fitness and weight loss contributed to improved glucose tolerance equally and independently — so exercise is not just a way to lose weight here.
- Weight loss above 5% returned 43% of people with prediabetes to normal glucose regulation, and those who achieved that had a 73% lower risk of progressing to diabetes.
- Remission of type 2 diabetes is possible, particularly within the first few years of diagnosis, and it is strongly tied to the amount of weight lost.
- None of this is a reason to change your medication. That decision belongs to your prescriber.
QUICK ANSWER
Can prediabetes be reversed?
Yes, frequently. In the Diabetes Prevention Program, the landmark US trial, intensive lifestyle intervention reduced progression to type 2 diabetes by 58% over roughly three years — compared with 31% for metformin — using targets of 7% body weight loss and at least 150 minutes per week of moderate activity. In people aged 60 and over, the reduction was 71%. Separate research found that weight loss greater than 5% returned 43% of participants with prediabetes to normal glucose regulation, and that those achieving remission had a 73% lower risk of developing type 2 diabetes than those who did not. Improvements were driven by increased fitness and weight loss acting equally and independently, meaning exercise matters in its own right rather than only as a means of losing weight.
What prediabetes actually means
Prediabetes means blood glucose is higher than normal but not yet in the diabetic range. It’s usually caught through an A1C test, a fasting glucose, or a glucose tolerance test.
The important thing about that definition is the word yet. It describes a direction of travel, not a fixed state — and the direction can be changed. A large body of evidence says so.
What’s often missed is what sits underneath it: insulin resistance. Your pancreas is producing insulin, but your cells are responding to it poorly, so it takes more and more to do the same job. Skeletal muscle is where most glucose gets disposed of, which is why muscle mass and muscle quality matter enormously here — and why a plan built only around eating less misses half the mechanism.
More on the underlying picture in metabolic health after 40 and after 50.
The trial that settled it
The Diabetes Prevention Program is the study everything else refers back to. Over 3,000 participants with prediabetes, randomised to intensive lifestyle intervention, metformin, or placebo.
Lifestyle intervention reduced the incidence of type 2 diabetes by 58%. Metformin reduced it by 31%.
Lifestyle beat the drug by close to two to one. And in participants aged 60 and over, the lifestyle effect was larger still — a 71% reduction in incidence.
The benefit persisted. Long-term follow-up found a 27% lower incidence at 15 years, and reductions still measurable at 21 years. Parallel trials elsewhere found the same thing: 58% in the Finnish Diabetes Prevention Study, 39% at 30 years in the Da Qing study in China.
This is among the better-replicated findings in preventive medicine, and most people who are told they have prediabetes never hear the number.
The targets are smaller than you’re imagining
Here’s the part that tends to surprise people.
The DPP’s two goals were:
- 7% of body weight
- At least 150 minutes per week of moderate-intensity physical activity, similar in intensity to brisk walking
That’s it. The current ADA Standards of Care recommend referral to a diabetes prevention program targeting 5–7% weight loss and the same 150 minutes, noting greater benefit at 7–10%.
| Starting weight | 7% target | 10% target |
|---|---|---|
| 180 lb | 13 lb | 18 lb |
| 200 lb | 14 lb | 20 lb |
| 220 lb | 15 lb | 22 lb |
| 250 lb | 18 lb | 25 lb |
| 280 lb | 20 lb | 28 lb |
The 7% figure wasn’t chosen because it’s optimal. It was chosen because it was feasible to achieve and maintain — and it still produced a 58% risk reduction.
If you’ve been quietly assuming you need to lose eighty pounds before anything improves, the evidence disagrees.
The part that gets left out
Almost every summary of this research talks about weight. Here’s what the DPP investigators actually found:
Improvements in glucose tolerance were related to both increased fitness and weight reduction — and the two contributed equally and independently to the reduction in diabetes risk.
Read that again, because it changes what a sensible plan looks like. Getting fitter helped separately from losing weight. Not as a mechanism for losing weight. On its own.
Which makes sense given the mechanism. Skeletal muscle is the primary site of glucose disposal, and both exercise and greater muscle mass improve insulin sensitivity. A plan that cuts calories without building strength is leaving half the available benefit unclaimed — and if it costs you muscle, it may work against you.
This is the clearest argument for structured resistance training rather than dieting alone, and it’s why the difference between weight loss and fat loss matters for blood sugar specifically.
Remission is a real and measurable thing
For prediabetes. Analysis of the Prediabetes Lifestyle Intervention Study, validated against DPP data, found that lifestyle-induced weight loss of more than 5% returned 43% of participants to normal glucose regulation. Those who achieved that remission had a 73% lower relative risk of developing type 2 diabetes than those who lost weight but didn’t. Remission rates rose as weight loss increased.
For type 2 diabetes. Remission is possible too, particularly in the first few years after diagnosis and particularly with larger weight loss. The DiRECT trial showed that a structured weight management programme delivered in primary care produced significant weight loss and diabetes remission in newly diagnosed adults. The DIADEM-I trial found remission in 61% of participants who lost 15% of their starting weight, among people under 50 diagnosed within the previous three years.
Two important caveats. Remission is not cure — it means blood glucose has returned to a non-diabetic range without medication, and it requires maintenance. And remission becomes less likely the longer you’ve had the diagnosis. If this is something you want to attempt, earlier is better, and it’s a conversation to have with your doctor now rather than later.
What this means in practice
Translating the evidence into a plan, the components are unglamorous and consistent:
Resistance training, two to three times a week minimum. Builds and preserves the muscle where glucose gets disposed of, and improves insulin sensitivity directly.
At least 150 minutes a week of moderate activity. The DPP floor. Brisk walking counts. More appears to be better.
Modest, sustained weight loss — 7 to 10%. Not forty pounds. Not immediately.
Adequate protein and resistance work so the weight you lose is fat. Losing muscle while losing weight is counterproductive for blood sugar specifically, because you’re reducing your own glucose disposal capacity.
Measurement. A1C and fasting glucose from your physician. Body composition to know whether you’re losing fat or muscle. Weight alone can’t tell you.
And keep taking what you’ve been prescribed. Metformin reduced risk by 31% in the DPP, which is a real effect. Lifestyle change and medication are not alternatives in competition — most people do best with their doctor coordinating both.
HOW WE APPROACH IT AT UNITE
Guests arrive with prediabetes diagnoses regularly, and increasingly with early type 2.
What we do is build the DPP’s components into a few concentrated weeks: resistance training six days a week at a five-to-one guest-to-coach ratio, chef-prepared meals, and a 21-point body composition assessment on arrival and every week after, so fat loss and lean mass are tracked separately rather than lumped together as “weight.”
Across the 133 most recent measured guest stays, a median 86.9% of weight lost came from body fat, not lean mass — which matters here more than almost anywhere, because the lean mass is the glucose disposal.
Nurse practitioners are available. We don’t prescribe, adjust or manage medication — that stays with your own physician — and you leave with a written record they can use.
Our Longevity Program adds a comprehensive blood panel including HbA1c, fasting insulin and HOMA-IR, with a private results consultation.
Frequently asked questions
Can prediabetes be reversed?
Often, yes. Research analysing the Prediabetes Lifestyle Intervention Study alongside DPP data found that weight loss above 5% returned 43% of participants to normal glucose regulation, and those who did had a 73% lower risk of developing type 2 diabetes than those who didn’t. Remission became more likely as weight loss increased.
How much weight do I need to lose?
The Diabetes Prevention Program used a 7% target, chosen because it was feasible to achieve and maintain — and it produced a 58% reduction in diabetes incidence. ADA guidance recommends 5–7%, noting greater benefit at 7–10%. For someone at 220 pounds, 7% is about 15 pounds.
Is exercise or diet more important for prediabetes?
Both, and the DPP found they contributed to improved glucose tolerance equally and independently. Exercise helped separately from its effect on weight. Resistance training matters particularly, because skeletal muscle is the primary site of glucose disposal.
Is lifestyle change better than metformin?
In the DPP, intensive lifestyle intervention reduced diabetes incidence by 58% versus 31% for metformin, and the difference persisted in long-term follow-up. That said, they are not competing options — metformin’s effect is real, and many people benefit from both. Never start or stop any medication without your prescriber.
Can type 2 diabetes go into remission?
It can, particularly within the first few years after diagnosis and with substantial weight loss. The DIADEM-I trial reported remission in 61% of participants who lost 15% of their starting weight, among adults under 50 diagnosed within three years. Remission means glucose has returned to a non-diabetic range without medication; it is not a cure and requires maintenance. Discuss it with your physician.
Does it still work if I’m older?
Better, on this evidence. DPP participants aged 60 and over saw a 71% reduction in diabetes incidence from lifestyle intervention, compared with 58% in those under 60.
Will a few weeks at a retreat fix this?
No, and anyone who says otherwise is selling something. What a few concentrated weeks can do is establish the habits, build the muscle, and produce measurable change in a short enough window that you can see it working — which is often what makes the next twelve months possible. The DPP intervention ran for years, not weeks.
Should I stop my diabetes medication if my numbers improve?
No — not without your prescriber. Changes to diabetes medication need clinical supervision, and glucose levels should be monitored through any adjustment. Take your results to your doctor and let them make that call.
Just been told you’re prediabetic?
Twenty minutes on the phone, no obligation — including if Unite isn’t the right fit.
Or call 844-864-8388
Read next
- Metabolic Health After 40
- How to Improve Metabolic Health After 50
- Weight Loss vs. Fat Loss
- Can You Attend a Fitness Retreat With High Blood Pressure?
- The Longevity Program
References
Prevention or Delay of Diabetes and Associated Comorbidities: Standards of Care in Diabetes — 2026. American Diabetes Association.
The Diabetes Prevention Program (DPP): Description of Lifestyle Intervention.
Prevent Type 2 Diabetes: Lifestyle Change Program. Centers for Disease Control and Prevention.
Role of weight loss-induced prediabetes remission in the prevention of type 2 diabetes.
This article is for general information and is not medical advice. Unite Fitness Retreat does not diagnose, treat or prescribe, and does not manage diabetes or any other condition. Do not start, stop or change any medication without consulting your prescriber. If you have diabetes or prediabetes, any change to diet or exercise should be discussed with your physician, who can advise on glucose monitoring. Results vary with each individual.
