When (and how much) to adjust macros on a cut

The most common mistake on a cut is not eating too much or too little. It is changing the plan too often. Every flat day on the scale becomes a reason to cut another hundred calories, and within a month you are eating far less than you need to, with no idea which change did what.

Good macro adjustment is slow, evidence-based, and boring. Here is how to do it.

Wait for a trend, not a reading

Daily body weight is noisy. Water, sodium, glycogen, and the timing of your last meal can swing the scale by a kilo or more, none of which is fat. A single weigh-in tells you almost nothing. A two-week average tells you almost everything.

The rule of thumb: do not adjust anything until you have at least two weeks of clean data since your last change. "Clean" means you actually logged, you hit your targets most days, and nothing unusual (illness, travel, a big sodium night) is distorting the numbers.

Check adherence before you touch macros

If your stall came in a fortnight where you only logged five days out of seven, the problem is not your macros. It is the data. Lowering calories on top of inconsistent logging just makes the plan harder to follow and the next read even murkier.

This is why AskCoach suspends macro changes when adherence drops below 90%. A plan you follow at a B-plus beats a perfect plan you abandon. Fix the logging first, then read the trend, then adjust.

How much to move

When the trend is genuinely flat over two clean weeks and you are still above your target rate of loss, make one small change, not three.

• Start with calories from carbohydrate or fat, never protein. Protein protects muscle in a deficit, so it stays put.
• A modest cut of roughly 5 to 10 per cent of your current intake is usually enough. You are nudging the deficit, not slashing it.
• Change one variable, then wait another two weeks to read the result. If you move calories, steps, and training in the same week, you learn nothing about which one worked.

Steps are an adjustment too

Before you drop food again, look at your daily movement. If your step average has quietly fallen, your deficit shrank without you touching a macro. Often the right "adjustment" is restoring your step floor, not eating less. Less food with less movement is a worse position than the same food with more.

The discipline here is patience. Two weeks of clean data, one small change, then wait again. AskCoach enforces that loop for you: it holds adjustments until the data is clean, reads the trend rather than the daily number, and moves one lever at a time so you always know what changed.