Start standing, a dumbbell at your chest, then push your butt back and bend at the knees, lowering your body until thighs are nearly parallel to the floor. Hold for 1 second. Stand, then repeat, this ...

But without the business of my daily commute and lunchtime trips to Pret to occupy me, the amount of time I spent sitting down – and the impact that was having on my body – became a lot clearer.

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