If your weight suddenly feels harder to manage during perimenopause — especially around the abdomen — insulin resistance may be part of the picture.

Many women are told to “eat less and move more,” yet they notice that their body composition shifts despite consistent effort. Fat accumulates more easily around the midsection. Energy fluctuates. Cravings increase. Recovery from exercise slows.

These changes are not random. They are rooted in how hormonal shifts affect glucose regulation and metabolic flexibility.

Understanding insulin resistance during perimenopause is not about blame — it’s about physiology.

What Is Insulin Resistance?

Insulin is a hormone that helps move glucose (sugar) from your bloodstream into your cells, where it’s used for energy.

When your body becomes insulin resistant, your cells respond less effectively to insulin. As a result:

• The pancreas produces more insulin to compensate
• Blood sugar regulation becomes less stable
• The body is more likely to store excess energy as fat

Chronically elevated insulin levels can encourage fat storage, particularly in the abdominal region.

Why Perimenopause Increases the Risk

Estrogen plays an important role in insulin sensitivity. During perimenopause, estrogen levels fluctuate and gradually decline. This affects:

• Glucose uptake in muscle tissue
• Fat distribution patterns
• Appetite regulation
• Mitochondrial function

Lower and fluctuating estrogen can reduce insulin sensitivity, making it easier to store energy and harder to access stored fat.

This is one reason weight gain during perimenopause often concentrates around the abdomen — a pattern sometimes referred to as visceral fat accumulation.

If this sounds familiar, you may want to read our in-depth breakdown of Insulin Resistance and Belly Fat in Perimenopause, which explores how hormonal shifts influence abdominal fat specifically.

Signs Insulin Resistance May Be Contributing

While only blood work can confirm insulin resistance, common signs include:

• Weight gain despite unchanged habits
• Increased belly fat
• Strong carbohydrate cravings
• Energy crashes after meals
• Brain fog after eating
• Difficulty losing weight even with calorie control

It’s important to note that these symptoms can overlap with other perimenopausal changes, including sleep disruption and stress-related cortisol shifts.

For a broader look at why weight gain can happen even when you’re “doing everything right,” see Why Perimenopause Causes Weight Gain (Even If You’re Doing Everything Right).

Why Diet and Exercise May Suddenly Stop Working

In a metabolically flexible body, reduced calorie intake and increased movement often result in fat loss.

But when insulin levels remain elevated, fat storage is prioritised and fat burning is suppressed.

This means that:

• Aggressive calorie restriction can backfire
• Excessive cardio may increase stress load
• Muscle loss may occur more easily
• Recovery slows

We explore this metabolic shift further in Why Diet and Exercise Stop Working the Same Way in Perimenopause.

The issue isn’t effort — it’s metabolic context.

How to Improve Insulin Sensitivity in Perimenopause

While insulin resistance is common, it is not irreversible. The goal is to improve metabolic flexibility rather than chase extreme restriction.

Key strategies include:

Prioritising Protein

Adequate protein intake helps preserve lean muscle mass, which improves insulin sensitivity.

Resistance Training

Muscle tissue is one of the most effective sites for glucose uptake. Strength training increases insulin responsiveness over time.

Stabilising Blood Sugar

Balanced meals that combine protein, fiber, and healthy fats can reduce large glucose spikes and crashes.

If energy crashes are a major issue, you may also want to read How Blood Sugar Affects Energy in Perimenopause, which explains the connection between glucose regulation and fatigue.

Managing Sleep and Stress

Poor sleep and chronic stress elevate cortisol, which can worsen insulin resistance. Addressing sleep quality often improves metabolic outcomes.

When to Consider Testing

If symptoms are persistent, you may want to discuss testing with a healthcare provider. Useful markers can include:

• Fasting insulin
• Fasting glucose
• HbA1c
• Lipid profile
• Waist-to-hip ratio

Insulin resistance often develops gradually and can go unnoticed without testing.

The Bigger Picture

Insulin resistance during perimenopause is not a personal failure. It reflects a transitional phase in metabolic regulation.

The goal isn’t to punish your body into submission. It’s to support muscle mass, stabilise blood sugar, manage stress, and make informed supplement choices when appropriate.

For a practical overview of supplements commonly discussed for metabolic support, see our guide to Best Supplements for Weight Gain & Body Recomposition in Perimenopause.

Understanding the physiology gives you leverage. And leverage changes outcomes.