The reason Americans should keep fit and maintain a normal weight is to enjoy life.
A representative of the Board of Trade said that all that was necessary to avoid colds was to keep fit and not approach infection.
As long as you keep fit you are safe; but if you get run down a bit you'll go.
Like the golfer who played golf so much in order to keep fit for golf, we have here a good old-fashioned beneficent circle.
He even makes desperate efforts to keep fit while at home, and for a time he succeeds.
"When you haven't time for sleep, the next best thing is to feed well if you want to keep fit," he remarked.
We do not expect luxuries, but to do good work we must keep fit.
The men didnt like it but I got a squad of men to look out for an my first duty is to keep fit.
Oliver has gone for a brisk walk, to keep fit he said, as if it made any difference whether he kept fit or not.
You are a pious and virtuous woman, and your pity and prayers must keep fit company.