Signs of Insulin Resistance - And What to Do Next

Insulin resistance is more common than many people realise, and it often develops quietly before any formal diagnosis is made. Understanding the signs of insulin resistance early gives you the best opportunity to address the condition through lifestyle changes, including structured exercise. If you have been feeling persistently fatigued, experiencing unexplained weight gain, or noticing other subtle shifts in how your body feels, it may be worth looking deeper at how well your body is responding to insulin. An exercise physiologist can assess your metabolic health and help design a structured program to improve insulin sensitivity.

What Is Insulin Resistance?

Insulin is a hormone produced by the pancreas that acts like a key, unlocking cells so they can absorb glucose from the bloodstream and use it for energy. When the body becomes insulin resistant, that key no longer works as effectively. Cells require increasingly higher amounts of insulin to manage blood glucose, which places ongoing stress on the pancreas and can gradually elevate blood sugar levels.

Over time, this process is associated with the development of prediabetes and type 2 diabetes. It is also linked to a cluster of metabolic issues including elevated blood pressure, abnormal cholesterol levels, and increased abdominal fat. Recognising the early signs of insulin resistance is an important step in reducing those longer-term risks.

Common Signs of Insulin Resistance

Insulin resistance does not always present with obvious symptoms, but there are patterns worth paying attention to. While none of these signs alone confirms a diagnosis, a combination of them may warrant a conversation with your GP or allied health provider.

Persistent Fatigue and Low Energy

When cells cannot efficiently absorb glucose, the body struggles to produce consistent energy. This can lead to fatigue that does not resolve with adequate sleep, or energy crashes after meals that are high in refined carbohydrates.

Increased Hunger and Sugar Cravings

Because glucose is not being effectively used by the cells, the brain may continue to signal hunger even shortly after eating. Intense cravings for sugar or carbohydrates are a commonly reported experience in people with elevated insulin levels.

Difficulty Losing Weight

High circulating insulin encourages the body to store fat, particularly around the abdomen. Individuals with insulin resistance often find that standard diet and exercise approaches are less effective until the underlying metabolic issue is addressed.

Skin Changes

A condition called acanthosis nigricans, characterised by darkened patches of skin around the neck, armpits, or groin, is a recognised physical marker associated with insulin resistance. Some people also notice small skin tags in these areas.

Elevated Blood Pressure and Cholesterol

Insulin resistance is frequently associated with higher triglycerides, lower HDL (good) cholesterol, and raised blood pressure. These markers are often identified through routine blood tests before any direct insulin measurement is taken.

What is a Fasting Blood Insulin Test?

A fasting blood insulin test measures the level of insulin in your blood after a period of fasting, typically eight to twelve hours. Unlike a standard fasting glucose test, which measures blood sugar, this test looks directly at how much insulin your pancreas is producing to manage that glucose. Elevated fasting insulin can indicate that your cells are becoming resistant and that the pancreas is working harder than it should.

This type of insulin resistance test is not always ordered as a standard part of routine care. If you are concerned about your metabolic health, speak with your GP about whether fasting insulin testing, alongside other markers such as a fasting glucose and HbA1c, would give a clearer picture of your current status.

Is There an Insulin Resistance Test at Home?

Currently, there is no validated at-home insulin resistance test that measures insulin levels directly in the way a laboratory test can. Some people track indirect indicators at home, such as monitoring fasting blood glucose with a glucometer, recording energy levels, and observing physical signs. However, these are not substitutes for formal testing. If you suspect insulin resistance, professional assessment remains the most reliable pathway forward.

How Can Exercise Physiology Help Manage Diabetes?

Exercise physiology is one of the most powerful tools available for improving insulin sensitivity and supporting diabetes management. Structured, evidence-based physical activity has been shown to enhance the way cells absorb glucose, which can reduce the burden on the pancreas and improve blood glucose control over time. According to the American Diabetes Association, regular physical activity opens an alternate pathway for glucose to enter muscle cells, bypassing the need for insulin as an intermediary (American Diabetes Association, 2024).

An accredited exercise physiologist can design a personalised program that accounts for your current fitness level, health history, and specific metabolic goals. This is particularly important for individuals with prediabetes or type 2 diabetes, where exercise needs to be calibrated carefully to maximise benefit while minimising risk.

Types of Exercise That Support Insulin Sensitivity

Both aerobic exercise and resistance training have demonstrated benefits for blood glucose management. Aerobic activity, such as brisk walking, cycling, or swimming, supports cardiovascular health and helps lower blood glucose during and after each session. Resistance training builds muscle mass, which plays a direct role in glucose uptake and long-term metabolic health. A balanced program typically includes both forms of movement.

The Role of Lifestyle in Addressing Insulin Resistance

While medication may be appropriate in certain circumstances, lifestyle intervention remains the foundation of managing and in many cases improving insulin resistance. Physical activity, dietary adjustment, and weight management each contribute meaningfully to improving how the body uses insulin.

Being sedentary, carrying excess body weight, and consuming a diet high in refined carbohydrates are all recognised contributors to insulin resistance. Small, consistent changes, particularly increasing structured physical activity, can have a significant positive impact on metabolic health over time.

Why Professional Guidance Matters

Self-directed approaches to exercise and diet may provide some benefit, but working with a qualified exercise physiologist allows for a structured, progressive, and safe program. This is especially important for individuals with existing health conditions or those who have not been consistently active. A supervised approach also provides accountability, which plays a meaningful role in long-term adherence.

Exercise Physiology for Insulin Resistance in Balmain

If you are noticing signs of insulin resistance or have been advised to improve your metabolic health, evidence-based exercise physiology support is available at Sydney Allied Health Group in Balmain. The team takes a personalised, goal-oriented approach, working with you to develop a structured exercise program that fits your lifestyle and supports your long-term health outcomes.

Whether you are managing an existing diagnosis or looking to take a proactive step in improving your insulin sensitivity, getting a proper assessment is the right place to start. You do not need to manage this alone, and early action makes a meaningful difference.

📅 Book an exercise physiology session with Sydney Allied Health Group in Balmain and take a structured, evidence-based approach to managing your metabolic health.

References

American Diabetes Association. (2024). Insulin Resistance. Diabetes.org. https://diabetes.org/health-wellness/insulin-resistance