Looks like on average at least 2 hrs/week. But then this:
Quote:
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"Based on data that included more than 11,000 older people, they found that people who exercised about 52 hours over a period of about six months showed the biggest improvements in various thinking and speed tests. On average, people exercised for about an hour, three times a week. And the effect applied to both people without cognitive decline as well as those with mild cognitive impairment or dementia."
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http://amp.timeinc.net/time/5294493/...hy-brain-aging
05-31-18, 07:49 AM
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