Uninterrupted sitting beyond 25 minutes linked to lower muscle activity
Swinburne researchers used sensor-equipped shorts to track muscle electrical activity across more than 7,000 sitting periods. They found that sitting without a break for over 25 minutes was associated with reduced muscle activity, which may affect blood flow and blood sugar uptake. Breaking up sitting with movement or walking appeared to keep muscles more active and may lower risks for heart disease and type 2 diabetes.
Researchers at Swinburne equipped shorts with conductive textile sensors to record electrical signals from muscles during everyday sitting. Across more than 7,000 sitting periods, uninterrupted bouts longer than 25 minutes corresponded with diminished muscle activity.
That reduced activity may accompany decreased blood flow and less blood sugar uptake, factors tied to heart disease and type 2 diabetes. The team suggests brief movement breaks, walking, or even small seated movements can help keep muscles engaged; they estimate breaking up 10 hours of sitting every 25 minutes could add about 1.5 hours of muscle activity.
This finding could affect desk-based workers, students, commuters, and others who sit for long stretches. If these findings translate broadly, simple movement reminders or sensor-enabled clothing may help people notice prolonged inactivity and reduce associated risks. Employers and health professionals could use such insights to encourage brief, regular breaks, though individual