Break up long sitting with movement

Stand and move for a couple of minutes every half hour or so of sitting.

Why it works

Prolonged uninterrupted sitting impairs how muscles clear glucose from the blood and slows circulation, independent of whether you exercise otherwise. Short, frequent movement breaks reactivate the large leg muscles, improving glucose handling and blood flow — the harm is in the continuity of sitting, so interrupting it is the lever.

How to do it

1. Set a cue to stand and move for ~2 minutes every 30 minutes of sitting.
2. Walk, do a few squats, or march in place — any large-muscle movement counts.
3. Tie breaks to natural triggers like the end of a meeting or a page of work.

Evidence

Trials show that interrupting prolonged sitting with short, regular activity breaks improves post-meal glucose and insulin responses compared with continuous sitting. (rct)

Most studies measure short-term metabolic markers in lab settings; long-term health outcomes from sitting breaks are less firmly established.

Sources

• Dunstan et al. (2012), breaking up sitting time reduced postprandial glucose and insulin, Diabetes Care

Common mistake

Assuming a single morning workout cancels out eight hours of unbroken sitting — the continuity of sitting carries its own risk that the workout doesn’t fully offset.