After exercise should be at least 30-40 minutes before eating, ordinary exercise can be eaten after 0.5 hours, sports slimming people should be at least 1.5-2 hours before eating. Regular exercise can enhance physical fitness, promote digestion, increase appetite, while after exercise is the body’s fastest absorption of nutrients, is conducive to replenishing a variety of nutrients. But it is not recommended to eat immediately after exercise, because just after exercise blood are working, naturally reduce the blood supply in the gastrointestinal tract, can affect the absorption and digestion, reduce the uptake and utilization of nutrients in food. And fitness for the purpose of people, if premature meals, can lead to more obesity due to better absorption. In addition, for the older middle-aged and elderly groups, it is recommended not to carry out strenuous exercise, can be appropriate walking, playing tai chi, while eating after exercise need to pay attention to light, avoid too greasy.