MindHow your heart rate variability can offer an insight into your mind Smartwatches commonly use heart rate variability to monitor stress. Columnist Helen Thomson explores what this metric actually tells us, and whether it could also predict and diagnose depression – and help improve your mental health more generally Comment
HealthHow working out like an astronaut can reduce back pain and slow ageing The same principles that help astronauts stay strong in microgravity can help us all resist the slow collapse of ageing – and it’s not all about hitting the gym more Features