SCIENCE: Weights keep brain nimble, research suggests. “The University of Sydney study shows resistance weight training could be crucial in keeping the ageing brain nimble, as working out with weights was found to boost the mental agility of older people with mild cognitive impairment – a common precursor of dementia that is not treatable with drugs. Geriatrician Maria Fiatarone Singh, the study’s chief investigator, said weight training stimulated hormones that promoted muscle growth. ‘It’s possible these hormones are also having similar benefits for brain function,’ Singh said.”