Why “eat less, move more” stops working in midlife

"Eat less, move more" is probably the single most repeated piece of weight management advice and for a lot of women, it genuinely worked for years. So when it suddenly stops working in your 40s, it's natural to assume you're doing something wrong, or simply not trying hard enough.

In most cases, neither is true. The advice itself hasn't changed. Your body has.

The problem with a one-size-fits-all calorie deficit

"Eat less, move more" rests on a simple calories-in-versus-calories-out model, which holds some truth but misses a lot of what's actually happening physiologically in midlife. As insulin sensitivity shifts and hormonal patterns change, the same calorie deficit that worked reliably a decade ago can produce a very different result today — sometimes very little change at all, despite real, consistent effort.

On top of that, aggressive calorie restriction can increase stress hormones like cortisol, which in turn can worsen blood sugar regulation and even encourage fat storage around the midsection — working directly against the goal.

More exercise isn't always the answer either

Pushing harder with intense cardio is often the instinctive response when results stall, but for a body that's already under stress, whether physical, hormonal or psychological, additional high-intensity exercise can sometimes add to that load rather than relieve it. Many women find that incorporating more strength-based movement, alongside adequate recovery, produces better results than simply doing more cardio.

What tends to work better instead

Rather than eating less across the board, the more effective approach usually involves eating in a way that supports stable blood sugar — adequate protein, balanced meals, and consistent meal timing, alongside strength-focused movement and genuine attention to sleep and stress. This isn't about doing more. It's about working with what your body actually needs at this stage, rather than what worked at a different one.

Giving yourself permission to change strategy

There's often an unspoken pressure to keep pushing the same approach harder, as if switching strategy is somehow giving up. In practice, the opposite tends to be true. Recognising that your body's needs have genuinely changed and adjusting your approach to match, is usually what actually gets results moving again, after months or years of a strategy quietly working against you.

This shift in mindset, as much as any specific change to food or movement, is often the real turning point for the women I work with.

The bottom line

If "eat less, move more" has stopped working for you, the problem isn't your discipline. It's that the strategy hasn't kept pace with how your body has changed. A more personalised approach — one that accounts for blood sugar, hormones, sleep and stress together, tends to succeed where generic advice has stalled.

If old strategies have stopped working, it might be time for a different approach altogether.

The RESET Diagnostic is a 30-minute session to help you understand what's really going on, and what's worth trying instead. Find out more here.