Here is a pattern that should make every adult over 40 pause. India’s large national surveys suggest prediabetes is roughly as common as diabetes itself. That means a vast number of adults are walking around with HbA1c quietly sitting in the 5.7 to 6.4 percent band, fasting insulin creeping up, and no idea anything is wrong. Doctors commonly discover it by accident. Someone comes in for a knee, a back or a shoulder, a routine blood panel gets done, and there it is: the road to diabetes, with roughly a decade still in hand to turn around.
This article is about that window. The ten to fifteen years in which diabetes is approaching, announcing itself in your blood work, and still largely reversible.
The Silent Runway: How Diabetes Actually Develops
Type 2 diabetes does not begin the day your fasting sugar crosses 126. It begins ten to fifteen years earlier with insulin resistance. In plain words, your muscle, liver and fat cells gradually stop responding to insulin, the hormone whose job is to tell them to absorb glucose from the blood. Your pancreas compensates the only way it can, by producing more insulin. For years this extra effort keeps your glucose looking normal. You feel fine. Your annual fasting sugar report says ‘normal’. Meanwhile insulin levels climb, the pancreas strains, and the machinery slowly wears out.
It is like a slow monsoon leak in the roof. The ceiling looks fine for years while water soaks quietly into the plaster, and by the day the stain appears, the leak is old. Eventually the pancreas can no longer keep up, glucose finally rises, and one day a report says diabetes. By then the process is more than a decade old, and some of the damage, to nerves, blood vessels and the pancreas itself, has already begun.
Prediabetes is the visible tip of this process: HbA1c between 5.7 and 6.4 percent, or fasting glucose between 100 and 125 mg/dL. India is one of the world’s centres of this epidemic, and large national studies suggest a substantial share of people with prediabetes progress to diabetes within a few years if nothing changes.
Why Your Annual Fasting Glucose Test Keeps Missing It
Fasting glucose is the last domino to fall. It stays normal for years precisely because your pancreas is flooding the system with extra insulin to hold it down. Testing only glucose is like judging a family’s finances by whether the bills were paid this month. It says nothing about the loans being taken to pay them. To see the process early, three tests belong together:
- Fasting insulin. This rises years before glucose does. It is common to find clearly elevated fasting insulin sitting alongside textbook-normal glucose.
- HOMA-IR. A simple calculation from fasting glucose and fasting insulin that estimates how insulin resistant you are. Values creeping above roughly 2 suggest the process is under way.
- HbA1c. Your three-month average glucose. The 5.7 to 6.4 percent band is the formally defined prediabetes zone, and a value in that band is a call to action, not a curiosity.
Ask for all three together. The cost is modest, and the decade of warning they can buy is not available at any price later.
The Muscle-Loss Connection: Why This Is A Degenerative Story Too
Why do so many people who first seek help for a knee or a back turn out to have insulin resistance? Because the two problems share a root. Muscle is the body’s largest glucose sink, the destination for most of the carbohydrate you eat. From the 40s onward adults steadily lose muscle, and inactivity, often enforced by a painful joint, speeds up the loss. A shrinking glucose sink means rising insulin resistance, long before diet alone can explain it.
This is the overlap BFLL is built around: the same muscle loss that destabilises your joints is quietly pushing you toward diabetes, and the painful joint that stops you moving speeds up both. Treating the knee without the metabolism, or the sugar without the muscle, is treating half the problem.
A Free Screening Tool You Already Own: The Measuring Tape
Waist-to-hip ratio, with the waist measured at the navel and the hips at the widest point, is one of the best free predictors of insulin resistance, because fat stored around the abdomen is the metabolically active kind, releasing signals that interfere with insulin’s work throughout the body. As a working guide, ratios above roughly 0.90 for men and 0.85 for women signal elevated risk, whatever the bathroom scale says.
One more thing every Indian adult should know: Indians tend to develop insulin resistance at lower body weights than Western populations. A ‘normal BMI’ with a growing waistline is a common and deceptive picture.
The Good News: This Is The Most Reversible Stage
The evidence on prediabetes is encouraging. Landmark prevention trials, including the American Diabetes Prevention Program and major Indian studies, found that structured lifestyle change cut progression to diabetes by more than half, outperforming medication. At this stage the pancreas still works, the insulin resistance is still largely functional rather than fixed, and the body responds quickly. It is entirely realistic to see a raised fasting insulin normalise on re-testing after structured intervention. That is what reversibility looks like on paper. Wait until diabetes is established, and the same effort buys smaller returns. The window is real, and it closes.
The BFLL Protocol: Test, Correct, Re-Test
1. Assessment
Body composition, waist-to-hip ratio, strength, sit-to-stand capacity and balance, establishing how much muscle you have and how well it works, alongside your history and family risk.
2. Pathology testing
Fasting insulin, fasting glucose, HOMA-IR, HbA1c and lipids together, plus vitamin D, B12 and thyroid, which frequently travel with this pattern. This combined panel is what surfaces the insulin resistance a lone glucose test would miss.
3. Correct the terrain
A structured programme of Therapeutic Strength Training and nutrition therapy aimed at the actual mechanism: rebuild the glucose sink, feed it enough protein, and reduce the abdominal fat driving the resistance. Deficiencies found on testing are corrected in parallel.
4. Re-test and prove it
Insulin, HOMA-IR and HbA1c are re-tested at sensible intervals. Improvement is proven on testing, not assumed, and if a number is not moving, the programme changes. Test, correct, re-test.
What Actually Moves The Needle
- Strength training, 2 to 3 times weekly. The single most direct treatment. It enlarges the glucose sink and multiplies the glucose doorways in muscle, improving insulin sensitivity for hours to days after every session.
- A protein-adequate diet. Enough protein at each meal to build muscle, with carbohydrate quality upgraded. Whole grains and millets over maida and sugar, rather than extreme restriction that nobody can sustain.
- A 10 to 15 minute walk after meals. Post-meal walking measurably blunts glucose spikes. An easy habit for any Indian household after lunch and dinner.
- Seven hours of sleep. Even a few nights of short sleep measurably worsens insulin resistance. Sleep is a metabolic treatment, not a luxury.
- Waist watching, not just weight watching. Track your waist-to-hip ratio monthly. It responds to the right training even when the scale barely moves.
Frequently Asked Questions
What does an HbA1c of 5.7 to 6.4 actually mean?
It means your average blood glucose over the last three months is above normal but below the diabetes threshold. That is the formally defined prediabetes band. It is not a diagnosis of diabetes, and it is not harmless either. It is the clearest early warning the body issues, at the stage where action works best.
I have prediabetes. Will I definitely get diabetes?
No. Without change, a substantial share of people with prediabetes progress within five to ten years. But prevention trials show structured lifestyle change cuts that risk by more than half, and many people return their numbers to normal with consistent effort.
Do I need medication for prediabetes?
That is a decision for your doctor, based on your overall risk. In the landmark trials, lifestyle intervention outperformed medication for preventing progression, which is why guidelines put structured exercise and diet first at this stage. Some higher-risk individuals are prescribed medication as well. The two are not rivals.
Which tests should I ask for, and how often?
Fasting glucose, fasting insulin (with HOMA-IR calculated) and HbA1c together, plus a lipid profile. Annually if results are normal but risk factors exist, and roughly every three to six months while actively correcting an abnormal result, as your clinician advises. Testing glucose alone is the mistake to avoid.
Medical disclaimer: This article is for education only and is not a substitute for personalised medical advice. Always consult a qualified healthcare professional before changing your treatment, diet or exercise programme.
Compiled and written by Soumick Mondal Raj, Founder and CEO of BFLL, Holistic Health Consultant.