The Sedentary Office Body久坐办公族 · 伤害不在坐姿, 在不动

Place · Level 3 · Movement

久坐的代价主要是肌肉不收缩带来的代谢停滞, 不是坐姿不标准 · 没有完美坐姿, 只有下一次起身

What 'sitting disease' really is

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久坐病到底是什么

If you sit at a computer eight or nine hours a day, you've probably heard 'sitting is bad for you' — and probably assumed the problem is 'bad posture'. But research points to a more fundamental, and less flattering, conclusion: the real variable is how long you sit still itself, not just whether you sit up straight.

Ekelund 2016 pooled data from over a million people worldwide and found sitting time is associated with higher all-cause mortality; crucially, that association is strongest in people who do little activity, and substantially attenuated — possibly eliminated — in those with a fair amount of daily moderate activity (~60-75 minutes).

That gives two clues. First, much of sitting's harm is independent of 'whether you go to the gym' — you might train an hour a day, but if the other dozen-plus hours are seated, the risk doesn't auto-zero. Second, what actually reverses it is breaking up the unbroken block of stillness and moving. The next scene shows what happens inside the body once muscle stops contracting for a long time.

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