Module 3: Nutrition Setup and Phase Mapping

The cycle doesn't change the rules. The calorie deficit is the calorie deficit. What it changes is how the plan feels in certain weeks, and how the scale reads.

The luteal phase (the week or so before a period)

Many women notice higher hunger and cravings (often for carbs and salty or sweet foods), more water retention and bloating, lower energy, and sessions that feel harder. How much varies a lot from person to person, so learn how it shows up for your client before planning around it.

The approach: same foods, bigger portions. Give her the option (not the obligation) of a slightly higher-calorie luteal version of the plan, using what's already in it:

• Double the chocolate in the evening yoghurt bowl she already has
• A salty, carby snack like pretzels
• Slightly bigger fat, carb or salt portions at a meal

It's an option she can use if she needs it. The point is to stop a hard week turning into an off-plan week.

Cycle masking on the scale

Water retention around the cycle can hide 1–2 weeks of fat loss on the scale. Don't pull levers on a cycle-masked week.

• Compare her weight to the same point in her last cycle, not to last week
• Lean on photos and measurements more, especially for smaller women
• Predict it before it happens, so she's expecting the bump (the wizard principle)

Ask, don't assume

Add a simple question to her check-in: where is she in her cycle? Some women track it, some don't, some have irregular cycles or use contraception that changes the pattern.

If a cycle goes missing or becomes very irregular during a diet, that's a sign to step out of the deficit and refer her to her GP. It isn't something to coach around (Module 7).

Hormonal contraception

Many clients use the pill, a hormonal IUD, an implant or similar. These often flatten the natural cycle, so phase-by-phase reading may not apply. Compare 4-week trends in weight, waist and photos instead. Expect some water shifts when a client starts, stops or changes method.

Red flags: step out and refer

These point to the body not coping with the energy cost, often after a long or aggressive cut. They're a reason to raise calories to maintenance and refer her to a GP, not to push on:

• A missing or very irregular period (the biggest red flag)
• Feeling cold all the time, persistent fatigue, brain fog out of proportion to sleep and stress
• Hair thinning, brittle nails, dry skin
• New gut problems, or low mood, anxiety and poor sleep that weren't there before
• Weight-loss resistance on a properly set deficit

If a client shares blood test results, don't interpret them. Say something like: "This looks worth your GP taking a look at. Can you bring it to them for a proper read?"