How to feel alive in an exhausting world

In an era of relentless screen time and sedentary habits, the TED Radio Hour explores why modern life leaves us exhausted—physiologically and mentally—and offers evidence-based ways to reclaim energy through movement, cellular health, and breathing.

Breaking Up Sitting with Movement

Physiologist Keith Diaz's research shows that prolonged sitting kinks arteries at the hips and knees, pooling blood in the legs and halting muscle contractions needed to clear fat and sugar, which over time fosters chronic conditions like diabetes and high blood pressure. Screens worsen this by disrupting interoception, the body's signals for needs like movement, as attention fixates on digital content instead.

A 2022 study found five minutes of gentle movement every 30 minutes sharply cuts blood sugar and blood pressure, even more than workouts alone. Replacing 30 minutes of daily sitting with movement lowers premature death risk by 18%. Host Manoush Zamorodi tested this in Diaz's lab: after eight hours of straight sitting, her glucose spiked; with breaks, it halved, blood pressure dropped five points, and mood improved.