Passage 4阅读理解
The right way to breathe（呼吸）during exercise
Exercising is great for your health-everyone knows this. However simply exercising isn't enough. It needs to be done properly.
While exercising, making sure your breathing is correct is very important. Naturally, we breathe through our nose. Not really.
Breathing through your nose has its advantages. Your nose hair acts like an air filter（过滤器）. Breathing through your nose also warms and moistens（使……湿润）the air. However, when you exercise, you should always make sure that you are taking in enough oxygen（氧气）. You can breathe through your nose while doing lighter exercise like yoga. During more heavy exercise, such as running, it is better to breathe through your mouth.
However, most people usually take quicker breaths while doing any heavy exercise. Quicker breathing is not a proper way of breathing. This can cause dizziness（头晕）and other health problems.
In fact, while doing exercise like running, one should breathe in a 3:2 ratio（比率）. This means that for the first three steps, the person should be inhaling（吸气）deeply. For the next two steps, the person should be exhaling（呼气）fully. In this way you can take in the largest amount of oxygen.
While we often breathe through our nose, breathing through our mouth is a good choice as well. Sometimes people use both their nose and mouth to breathe. While doing any exercise, your breaths should be deep, rather than quick. This will help you to burn more fat and keep you fitter.
A. Let's go over the basic points one more time.
B. Generally speaking simply exercising isn't enough.
C. This is one of the most common mistakes that people make while exercising.
D. However, do you know the right way to breathe during exercise?
E. By doing so, you can take in a higher amount of air and thus oxygen.
F. But when you exercise, is breathing through the nose always the best choice?
