阅读理解：Do you have the habit of running

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Do you have the habit of running before breakfast in the morning? Exercising on an empty stomach won't do harm to you and it may actually help, depending on your goal and health conditions.

Exercising before eating comes with the risk of feeling light-headed due to low blood sugar. You might feel tired or uneasy, and won't be able to exercise as enthusiastically as you would have. It is important for older adults to eat something before exercising, especially in the morning. But if your primary exercise goal isweight loss, exercising on an empty stomach may come with some promising benefits, There's some research to support the idea of exercising in the fasted (禁食的) state.

However, it may not be suitable for everyone. "Some people advocate fasted exercise, but these people tend to be young and in amazing physical shape," says Douglas Paddon-Jones, a muscle researcher and professor of the University of Texas "They have no health problems, and what they're eating is of high quality and carefully picked. " On the other hand, exercising in the fasted state without proper planning or professional guidance may run the risk of unhealthy body changes.