BBC News Review: Exercise helps the brain

source: BBC Learning English      2017年4月25日
Neil and Catherine teach you how to use the language the world's media is using to discuss this story:
A study says moderate exercise several times a week is the best way for the over 50s to keep their brains in good working order.
Australian researchers say combining aerobic activities, such as swimming, cycling or jogging, with muscle-strengthening exercises is most effective.
They support the idea that taking up exercise at any age is worthwhile.
Vocabulary:
sharp: mentally quick and intelligent
keep (something) at bay: prevent (something) from happening
stints: limited periods of time spent doing an activity
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