"exercise my mind" is correct and usable in written English.
It means to challenge or stimulate one's brain. Example: I like to do crossword puzzles to exercise my mind and keep my brain sharp.
As my physical fitness regimen reaches four months, I do wonder and even worry a bit that I need to exercise my mind beyond reading three newspapers a day, enjoying a book, volunteering, caring for grandchildren, and traveling.
The thought occurred that I would like to begin to exercise my mind, much like exercise for the body, to discipline my mind to remain in the present for longer and longer periods of time.
Nintendo also chose professional swimmer Kieren Perkins to promote Brain Age 2 in his native Australia, who commented, "Having used the original Dr Kawashima's Brain Training game for a while now, I was genuinely looking forward to all of the new ways I could exercise my mind.
"I've been exercising my mind," he said.
I didn't set out to write another, I was just exercising my mind and writing some ideas, until my agent said "You've got a book on your hands".
If my priority is to be healthy and be around to watch my children graduate from college, get married, have children (and for me to become a rock-star Nana), then my actions better have me eating right, exercising my mind, body and spirit, reducing stress levels, laughing more, etc. Refusing to exercise, eating too much, smoking, and ignoring my body is not in support of my priorities!
The ocean is a vast expression of a spirituality that calms my mind while exercising my physical boundaries and leaves me in awe.
"I changed my mind," I said, exercising my female prerogative.
"There's no doubt that the research assessment exercise, to my mind, has focused departments in their research strategy," says the University of Bristol's John Enderby, who chaired the physics assessment panel.
And as a mother of young women, I'd like to exercise minding my own business in the same way I'd hope others would for me if, and when, my daughters make those cringe-worthy choices many of us make in our 20s (myself very much included).
I spend at least an hour a day actively working, and in my free time I do counterpoint exercises to keep my mind active.
