People who schedule exercise into their busy day are more likely to get it done than those who do it when they have a free moment. But sometimes life throws a wrench into the best laid plans to exercise. Illness is a good example. Few people feel like going on a power walk when they have a temperature of 101 degrees. Despite this, some gung-ho exercisers choose to tough it out even when they feel ill. Is this a good idea? Should you exercise when you're sick?

    While it's good to be committed to fitness, everyone needs a day of rest especially when they've pushed themselves too hard and, particularly, when they're sick. That being said, whether you exercise when sick should depend upon how sick you are. Most people who are simply feeling a little tired with no other symptoms may feel re-energized after a workout. There's really no better cure for simple sluggishness than forty minutes of fast paced aerobic activity.

    On the other hand, there are probably more times that you shouldn't exercise when sick than occasions that you should. If you're running a fever, it's almost always best to take the day off. Intense exercise can temporarily suppress immune function and make it more difficult to fight off a cold or flu virus. Exercise also causes fluid loss through sweating which is harmful if you're running a fever. There are few benefits to exercising with a febrile illness.

    It's also best to take the day off from exercise if you're vomiting or have diarrhea. Exercising when you're sick with a gastrointestinal virus can lead to dehydration, lightheadedness, fainting, and dangerous electrolyte imbalances. If you have to make extra trips to the bathroom, do yourself a favor and give exercise a rest.

    Keep in mind that when you go to the gym to exercise when you're sick, you're exposing other people to illness. How many times have you heard someone with a hacking cough walking on the treadmill next to you? Chances are they're doing themselves and others around them more harm than good. It's best not to spread your illness around the gym.

    It's also important to avoid exercising outdoors in cold weather when you're sick for obvious reasons. If you're not feeling well, some gentle stretching exercises or yoga moves can be a good substitute for your standard workout until you start to feel better. Sometimes it's best to give your body a few days to heal and then you can come back stronger than ever!

    那些平时工作繁忙却能安排有规律的锻炼的人似乎比整天悠闲自在的人们更容易实施锻炼计划。不过有些时候生活中的一些事会破坏掉哪怕是最好的锻炼计划。例如生病。很少有人在发烧101度的时候喜欢出去快步行走。尽管如此，还是有些狂热的锻炼者会在生病时强迫自己锻炼。这么做好吗？人生病的时候到底是否应不应该锻炼？

    当然致力于保持健康是件好事，每个人都需要放松，尤其是忙碌工作之后和生病的时候。也就是说，生病的时候是否应该锻炼取决于你生病的程度。大部分仅感觉轻微劳累但无其它症状的人适当锻炼一下会感觉精力倍增。对付单纯的精神萎顿，没有比四十分钟的有氧快速步行更有效了。

    另一方面，假如你生病，那么不应该锻炼的时候大概比应该锻炼的时候多。如果你发烧了，那最好哪儿也别去。剧烈的运动会在短期内抑制你的免疫力，更难以对付那些感冒和病毒。锻炼时出汗会造成体液流失，这对你的病情有害无利。因此发烧的时候锻炼没有任何好处。

    在你腹泻呕吐时你也最好别去锻炼。得了肠胃病时去锻炼会导致脱水、轻微头痛、昏厥以及身体电解质失去平衡。所以你最好到浴室里泡个澡放松一下，先不要去锻炼。

    记住，如果你带病去健身房锻炼，你还会殃及别人。你听说过有人一面咳嗽一面在你旁边的跑步机上练习吗？如果那样的话，那将会对他和他周围的人都没有好处。所以最好不好把疾病带到健身房里。

    显而易见，避免生病时在寒冷的天气进行户外锻炼也同样重要。如果你感觉不舒服，可进行一些轻微的活动或瑜伽。有时候不去锻炼，让身体放松几天，等痊愈后你会觉得比以前更强壮。