Maintenance is not one permanent number. It is a moving range you can estimate, observe and refine.
Why maintenance is a range
Daily expenditure changes with steps, training, food intake, temperature and spontaneous movement. An equation returns a useful average, not a contract. Even if weekly energy balance is stable, individual days can sit above or below it.
The two-week calibration
Start from a TDEE estimate. For fourteen days, log intake with the same level of care and weigh under similar morning conditions. Compare the average of week one with week two. A stable trend suggests intake is close to maintenance; a clear trend gives a direction for a small adjustment.
What scale stability really means
Water can hide the signal. High-sodium meals, more carbohydrate, hard training, travel and the menstrual cycle can all change scale weight without changing fat. Extend the observation window rather than reacting to three noisy days.
Run a maintenance-calorie calibration
Choose one calorie target and keep the measurement conditions boringly consistent for 14–28 days. Log most foods, weigh under similar morning conditions and annotate unusual restaurant meals, travel, illness or menstrual-cycle changes. The goal is not perfect compliance; it is enough signal to distinguish a wrong estimate from normal water fluctuation.
If the multi-week weight trend is stable, observed intake is close to maintenance. If it moves, adjust the estimate gradually rather than rewriting the plan after every high or low day. A changing step count can explain a changing result even when recorded food appears identical.
Practical summary
- Use seven-day averages instead of single weigh-ins.
- Keep step count and training roughly typical during calibration.
- Adjust by 100–200 kcal, then observe again.
- Set a weekly step range before calibrating.
- Change the estimate by a small, documented amount.
Frequently asked questions
Can maintenance increase when I eat more?
Sometimes movement and the thermic effect of food rise, but not without limit. The response differs between people.
Do I need to track forever?
No. A short calibration can teach portions and patterns you later maintain more loosely.
Why does my watch overestimate?
Wearables infer expenditure from movement and heart rate; individual errors can be substantial.
Sources
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