Sit all day and still end back pain, eye strain, and bad sleep

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You have felt it. That dull, familiar ache that settles into your lower back around 2 p.m., somewhere between your third cup of coffee and the meeting you're not really listening to. You shift in your chair. You arch. You promise yourself you'll stand up in a minute. You don't. Here's the uncomfortable truth: your chair is not betraying you. Your body is doing exactly what bodies do when held in one position for too long. The problem isn't sitting. The problem is stillness. You've probably heard that "sitting is the new smoking," a phrase designed to scare you into a standing desk you'll abandon in three weeks.