Exercise is one of the best things you can do to rejuvenate yourself at the cellular level – but what’s the best way to do it? In this episode, Michael speaks to Associate Professor Matt Robinson from Oregon State University, who has discovered that just a few minutes of high-intensity exercise can help rejuvenate you at the cellular level, by helping restore your mitochondria, your cell’s energy powerhouses. They discuss how exercise has many benefits across your body - from your muscles, to your heart, your brain and even your skin! And we meet octogenarian and healthy ageing expert Dr Norman Lazarus, who didn’t start exercising until his fifties, and now cycles 100km a week, feeling at his prime.Producer: Catherine Wyler Assistant Producer: Gulnar Mimaroglu Executive Producer: Zoe Heron A BBC Studios production for BBC Sounds / BBC Radio 4.