Holiday Weight: Half a Kilo That Doesn't Leave After You Return — and It Explains "Creeping Obesity"

"It's a holiday, we'll go back to the plan" — the sentence repeated every summer. And the numbers reveal why we never quite go back.

The study

A prospective study of adults on a one- to three-week holiday found that 61% gained weight, averaging 0.7 lb (0.32 kg), with total gain across the study reaching 0.9 lb (0.41 kg)^[1],[2].

And the concerning finding

Significant weight gain occurred on holiday and persisted for six weeks after it ended^[1] — meaning the weight gained doesn't disappear automatically on returning to routine.

Why does half a kilo matter?

Because annual weight gain in adults is estimated at 0.4 to 1.0 kg per year — meaning a single holiday may account for most of an entire year's gain^[1]. As the researchers put it: if you're gaining a pound or two a year and gained three-quarters of it on a one- to three-week holiday, that is substantial gain in a short period^[2].

This is what is known as "creeping obesity" — gradual accumulation across years that produces health problems later^[2]. Twenty years × half a kilo = ten kilograms.

And in our context

Our holidays are nutritionally intense: long summer travel, Eid gatherings, and banquet seasons. Add that the ordinary weekly rhythm already raises our weight over short breaks (the weekend effect).

A holiday plan that doesn't wreck it

1. The goal is holding steady, not losing. Nobody loses weight while travelling — maintaining is a complete success.
2. Keep one fixed meal — breakfast is usually the easiest.
3. Walk: tourism is walking anyway — use it (steps).
4. Log simply: a photo of each meal without precise counting — awareness alone is enough.
5. And the most important point: return to your routine on the first day after getting back, not after a "transitional" week — the study says the following six weeks are the battle.