It is impossible to keep in good health unless we have sufficient recreation. The mind, too, needs rest to keep alert and vigorous. There is a lot of truth in the old saying, All work and no play makes Jack a dull boy. （实用的谚语！形容要劳逸结合）There are many games which we can play after our work is done. But its always advisable for people to remember that persons who sit much should take up sportsora kind of recreation that requires muscular exercise. Those who spend most of their time in the open air and have constant muscular labor, however, should adopt readingorsome other quiet forms of recreation that will give them some physical rest.
Cycling is said to be a capital means of recreation. But some people foolishly exhaust themselves by excessive exertion on the bike. The same may be said in regard to football. Tennis is a great form of recreation. Fishing requires much patience, but there is the risk of catching cold by prolonged exposure. A good brisk walk is one of the finest forms of exercise. For persons engaged in outdoor labor, chess playing is an excellent change.