‘Exercise, avoid bangs and invent fairy stories’: Henry Marsh’s guide to keeping #brains healthy. The #neurosurgeon spent decades making people’s brains better, but a scan led him to focus on the factors that stave off cognitive decline and boost the #qualityoflife. The more active a brain, the longer it takes for the batteries to run down. A universal #panacea. People who #exercise regularly have lower rates of #dementia and #depression