Practical insight on hormones, strength, and longevity for women in midlife.

Is Your Low-Calorie Diet Keeping You Stuck?

The Truth About Undereating, Stress, and Midlife Weight Loss

“I’ve been working out five or six days a week for months. I’ve cut out empty carbs, barely eat breakfast, and get plenty of fiber. So why can’t I drop these last 10 pounds? In fact, I feel like I’m gaining inches around my waist!”

If this sounds familiar, you are not alone. It is the exact scenario I hear from women over 40 every week: you are working harder, eating less, and getting the exact opposite of the result you expected.

The 80s and 90s Diet Culture Hangover

Most of us were raised on 1,200-calorie diet plans, fat-free snacks, and endless cardio. We were conditioned to believe weight loss was simple math: calories in versus calories out.

I speak from experience. My own battle with disordered eating began in my mid-teens and followed me for decades. For nearly 30 years, I viewed food as an earned reward, doing punishing cardio just to give myself permission to eat.

Calories still matter, but the body is not a calculator. Applying that old deprivation-based playbook in midlife can create fatigue, poor recovery, loss of muscle, and a plan that becomes nearly impossible to sustain.

Why Undereating Can Make Fat Loss Harder

When you chronically underfeed your body, it does not understand that you are trying to fit into a favorite pair of jeans. It responds to a shortage of fuel.

Your body cannot create fat from nothing, and eating too little does not make fat loss physically impossible. But severe restriction can set off adaptations that conserve energy, increase fatigue and hunger, reduce muscle mass, and make continued weight loss harder to sustain.

The Thrifty Gene Signal: The thrifty gene hypothesis proposes that humans may have inherited traits that helped our ancestors survive periods of scarcity by using energy efficiently and storing fuel when it was available. Those traits could become less helpful in a modern environment. It is an influential theory, not a settled fact, and it does not fully explain why people respond so differently to the same diet.¹
Your Energy Output Adjusts: As you lose weight, a smaller body naturally requires less energy. Some people also experience metabolic adaptation, meaning the body becomes more economical and burns somewhat fewer calories than expected. Fatigue can also cause you to walk fewer steps, sit more, and move less without realizing it. The size of these effects varies, but together they can contribute to a frustrating plateau.²
The Midlife Stress Compound: Perimenopause and menopause bring real changes in estrogen, sleep, body composition, glucose regulation, and where fat is stored. Many women begin carrying more fat around the abdomen while also finding it harder to maintain muscle. Add aggressive calorie restriction, hard daily workouts, work pressure, family responsibilities, and poor sleep, and you have a much larger recovery burden. Cortisol is not the only factor, but the combined stress load is real.³
Muscle Becomes Harder to Protect: When calories stay very low, the body does not lose only fat. It can also lose lean tissue, especially when protein intake is inadequate, and resistance training is missing. Because muscle supports strength, function, and daily energy expenditure, protecting it becomes especially important in midlife. Resistance training during weight loss can help reduce lean mass loss.⁴
Hunger and Loss-of-Control Eating Can Follow: Willpower is not necessarily the problem. For some people, rigid restriction increases food preoccupation and the risk of loss-of-control eating, particularly when stress and difficult emotions are already high. This does not happen to everyone, but bingeing after prolonged restriction should not automatically be treated as a character flaw.⁵

Your body is not betraying you. It is responding to a combination of low fuel, high demand, hormonal change, and inadequate recovery.

How to Fuel Your Body and Support Sustainable Weight Loss

Choose More Foods That Do Not Need Nutrition Labels: If calorie counting has controlled your eating for years, shift your attention from numbers to the balance of your meals. Build most meals around protein, colorful produce, satisfying carbohydrates, and healthy fats. Packaged food isn’t automatically bad, and you don’t have to measure every bite. The goal is to eat enough real food to feel energized and satisfied.
Make Protein the Anchor: Instead of counting every calorie, begin by including a meaningful protein source at each meal. For many adults, roughly 25 to 30 grams of high-quality protein per meal is a practical starting point for supporting muscle, although individual needs vary.⁶ Eggs, Greek yogurt, poultry, fish, meat, tofu, beans, and lentils all count. Protein powder can help when convenience or appetite makes eating enough difficult, but it doesn’t need to replace real meals.
Stop Treating Carbohydrates Like the Enemy: Carbohydrates provide fuel for training, recovery, sleep, and daily life. Fruit, potatoes, oats, rice, beans, and whole grains can all belong in a supportive eating plan. I use complex carbohydrates before workouts now, something my younger, diet-obsessed self would never have believed.
Redefine “Me Time” and Take Rest Days: I used to think rest days were soft. Exercise was my stress relief, so more always seemed better. But constantly hitting the trail or pounding it out in the gym stopped building me up and started wearing me down. Rest days give muscles time to repair and let you return to training with more energy. You do not build muscle during the workout. You build it when you recover from the workout.
Regulate Your Nervous System: Sleep is often the first thing we sacrifice when life gets hectic, even though everything feels harder when we are tired. Most adults should aim for at least seven hours of sleep regularly.⁷ A quiet walk, a few minutes of box breathing, or simply turning off your phone earlier can help your body move out of high alert and into recovery.

What About GLP-1 Medications?

GLP-1 medications can be powerful and effective tools. Because they reduce appetite and food intake, however, it can become surprisingly difficult to eat enough protein and other nutrient-dense foods. Current expert guidance emphasizes adequate nutrition and resistance training to help protect muscle and bone during treatment.⁸

Keeping the weight off can also become harder when treatment is reduced or stopped. In follow-up research, participants regained a substantial portion of their lost weight after semaglutide was withdrawn.⁹ A randomized withdrawal trial of tirzepatide found substantial regain among participants switched to placebo, while those who continued treatment maintained or lost additional weight.¹⁰

That is not proof of weak willpower. It is a reminder that obesity is a chronic condition and that medication changes need a long-term plan. If you are considering lowering or stopping a GLP-1 medication, work with your prescriber rather than changing it on your own.

In an upcoming post, I’ll take a deeper look at muscle preservation, nutrition, and weight maintenance after GLP-1 treatment.

Doing Less Can Produce Better Results

At 49, my relationship with food and my body has changed dramatically. When I finally started doing less, eating enough, and paying attention to sleep and recovery, the results surprised me. I had better energy, a better mood, more visible muscle tone, and more time for the people and projects that matter to me.

That is what this health journey is really about. It is not about spending your life chasing a smaller number. It is about building a body and a routine that allow you to live well.

If doing less and seeing better results feels impossible, I promise it isn’t. I would love to help you figure out where your current plan may be working against you and build an approach that supports your life instead of taking it over.

Drop a comment below, or book a strategy call so we can talk.