If you’ve been told you’re prediabetic, the most important thing to know is that this is reversible. Without changes, 15 to 30 percent of people with prediabetes develop type 2 diabetes within five years. But the right combination of movement, food choices, sleep, and weight loss can bring your blood sugar back into a normal range, sometimes within months.
What Prediabetes Actually Means
Prediabetes means your blood sugar is higher than normal but not yet high enough to qualify as type 2 diabetes. It’s diagnosed when your A1C falls between 5.7% and 6.4%, or your fasting blood sugar is between 100 and 125 mg/dL. Below those ranges is normal; above them is diabetes.
At this stage, your body is becoming less responsive to insulin, the hormone that moves sugar from your blood into your cells for energy. Your pancreas compensates by producing more insulin, but over time it can’t keep up. The good news is that this process hasn’t gone far enough to cause permanent damage, and your body can recover its sensitivity to insulin with the right inputs.
Move More, and Be Specific About It
Physical activity is the single most effective tool for improving insulin sensitivity. The CDC recommends at least 150 minutes of moderate-intensity aerobic activity per week. That’s about 30 minutes a day, five days a week. “Moderate intensity” means you can talk during the activity but can’t sing: brisk walking, cycling, swimming, or dancing all count.
Resistance training (bodyweight exercises, weight lifting, resistance bands) adds a second layer of benefit. Muscle tissue is one of the biggest consumers of blood sugar in your body, so building more of it gives your blood sugar more places to go. Aim for two sessions per week on non-consecutive days. You don’t need a gym membership. Squats, push-ups, and lunges in your living room work.
If 150 minutes sounds like a lot, start where you are. Even 10-minute walks after meals lower post-meal blood sugar spikes meaningfully. The key is consistency over intensity. A daily walk does more for your blood sugar than one hard workout on the weekend.
Reshape What You Eat
You don’t need a special “diabetic diet.” The most effective eating pattern studied for prediabetes is the Mediterranean diet, built around vegetables, fruits, whole grains, nuts, legumes, fish, and olive oil, with limited red meat and processed food. In one study from the Bialystok PLUS cohort, each point of increased adherence to a Mediterranean diet scoring system reduced the risk of prediabetes by about 10%. Higher adherence also correlated with lower fasting glucose, less insulin resistance, lower body fat around the midsection, and reduced inflammation.
The practical version looks like this:
- Build meals around fiber. Vegetables, beans, lentils, and whole grains slow down sugar absorption, preventing the sharp blood sugar spikes that stress your insulin system. Aim for half your plate to be non-starchy vegetables at most meals.
- Choose healthy fats over saturated fats. Olive oil, avocado, nuts, and fatty fish replace butter, cheese, and processed snacks. This shift improves your ratio of protective to harmful cholesterol, which matters because prediabetes raises cardiovascular risk too.
- Reduce refined carbohydrates. White bread, white rice, sugary cereals, pastries, and sweetened drinks cause rapid blood sugar spikes. You don’t have to eliminate them, but replacing them with whole-grain versions makes a measurable difference.
- Watch portions, not just food types. Even healthy carbohydrates raise blood sugar if you eat large quantities. A cup of brown rice is different from three cups of brown rice.
- Cut sugary drinks. Soda, fruit juice, sweetened coffee drinks, and energy drinks are some of the fastest routes to blood sugar spikes. Water, unsweetened tea, and black coffee are the simplest swaps.
Lose a Modest Amount of Weight
You don’t need to reach an “ideal” body weight. Losing just 5 to 7 percent of your current weight significantly improves insulin sensitivity and can push your blood sugar back below the prediabetic threshold. For someone who weighs 200 pounds, that’s 10 to 14 pounds. This is the target used in the landmark Diabetes Prevention Program trial, which showed lifestyle changes cut diabetes risk by 58 percent.
The combination of dietary changes and increased physical activity typically produces this level of weight loss without extreme dieting. Crash diets tend to backfire because they’re unsustainable and can cause muscle loss, which actually worsens insulin sensitivity over time. Slow, steady loss of one to two pounds per week is the pace that sticks.
Take Sleep Seriously
Sleep is an underappreciated factor in blood sugar control. When you’re sleep-deprived, your body releases more cortisol (a stress hormone that triggers your liver to dump extra sugar into your bloodstream). At the same time, your cells become less responsive to insulin, your appetite-regulating hormones shift toward hunger and cravings, and inflammation increases throughout your body.
Adults need a minimum of seven hours per night. Research on sleep extension found that people who increased their sleep beyond six hours showed significant improvements in fasting insulin resistance, insulin secretion, and the function of the pancreatic cells that produce insulin. If you’re sleeping five or six hours and eating well, poor sleep could be quietly undermining your progress. Consistent bedtimes, a cool and dark room, and limiting screens before bed are the highest-impact changes for most people.
When Medication Comes Into Play
Lifestyle changes are the first-line treatment for prediabetes, and most people can reverse it without medication. However, some people are candidates for metformin, a drug that reduces the amount of sugar your liver releases into your blood and improves insulin sensitivity. Clinical trials found metformin was most effective in people younger than 60, those with a BMI above 35, and women with a history of gestational diabetes. If you fall into one of those categories and lifestyle changes alone aren’t moving your numbers, it’s worth discussing with your doctor.
Metformin is not a replacement for diet and exercise. In studies comparing the two approaches, lifestyle changes were roughly twice as effective as metformin alone at preventing progression to type 2 diabetes. Think of medication as an add-on for higher-risk individuals, not a shortcut.
How to Track Your Progress
Once you’ve been diagnosed with prediabetes, the standard recommendation is to retest your A1C once a year. This gives enough time for sustained lifestyle changes to show up in your lab results, since A1C reflects your average blood sugar over the previous two to three months.
Between annual tests, you can monitor your progress through indirect signals: weight changes, energy levels, how you feel after meals, and waist circumference (a rough proxy for the visceral fat most linked to insulin resistance). Some people also benefit from a home glucose meter to see how specific meals affect their blood sugar. This can be motivating because you get immediate feedback: walk after dinner and watch the numbers drop.
If your A1C drops below 5.7%, you’ve technically reversed the diagnosis. But the metabolic tendency doesn’t disappear entirely. Maintaining the habits that got you there is what keeps you in the normal range long-term. The lifestyle changes that reverse prediabetes aren’t a temporary intervention. They’re a better way of living that happens to also protect you from diabetes.