Pilates for posture: what desk years do to a spine, and what undoes it

Posture is not a position. Telling somebody to sit up straight fixes it for about eight seconds. Posture is what your muscles do when you are not thinking about them, and after a decade of desks most of them have stopped doing anything at all.

What sitting switches off

Hip flexors shorten and pull the pelvis forward. Glutes, which should hold the pelvis level, go quiet because they are never asked. The upper back rounds towards the screen, the chest tightens, and the deep neck muscles give up and let the head hang forward. None of this hurts at first. It hurts at forty.

Why pilates works for it

Because it asks the switched-off muscles to work first. Every reformer exercise starts from the centre — the deep abdominals and the muscles along the spine — and loads the glutes, the mid-back and the shoulders in positions a desk never puts you in. The springs give feedback: you feel the moment your lower back takes over from your abdominals, which is the moment the habit is being built.

The exercises that matter most

• Footwork on the reformer, for hips and glutes that have forgotten how to extend.
• Rowing and pulling straps, for the mid-back that has rounded forward.
• Chest opening on the box, for a front that has tightened.
• Standing work on the carriage, for balance and the small stabilisers.

How much, and how soon

Two classes a week changes how you sit within a month; the feeling of "holding yourself up" stops being effort. Start with the guide to reformer pilates in Koh Samui if the machine is new to you, and pick a class from the timetable. a private session is worth it if a specific pain — one shoulder, one side of the neck — is the reason you are reading this.

Try a reformer class in Koh Samui

Isla is a ten-reformer studio in Chaweng, a few minutes from the beach, with small classes taught in English. If it is your first time here the intro offer is ฿1,800 for three classes; a single class is ฿900. Pick one from the timetable, or see the packs and prices first.