1, the straw that can exercise vital capacity itself is based on the principle of atmospheric pressure. When sports are used, some of the air inside will be sucked away. When the pressure in the straw decreases, the liquid in the bottle will rise at the other end in order to balance the pressure. When sports students stop inhaling, the liquid in the tube will drop. From this point of view, drinking water through a straw can really exercise vital capacity. And the straw has another advantage, that is, you don't have to worry about choking. Hiding under the covers when you are thirsty and drinking water directly through a straw is also a solution to the problem.
2, thermos cup According to the classmates, this sports student lives in the upper bunk. The reason why you drink water through a straw is because it is too cold to get out of bed in winter. Then the problem is coming. It doesn't seem to be a problem to put a thermos cup in such a big position on the bed. The problem that a cup can solve is to use a two-meter straw. This college student is also a wonderful work. From the video, the college student didn't drink hot water, but also bought a large bottle of mineral water from takeaway. In view of this, get yourself a bottle and put it on the bed. It's too hard to get a straw. Moreover, the straw will be contaminated with many bacteria when used many times, and it is also very troublesome to clean. It is not recommended for the public to use it.
3. How to exercise vital capacity There are many ways to exercise vital capacity, and there is no need to use wonderful methods. Such as exercise, singing and vocal exercises, can effectively exercise vital capacity. If this sports student is just lazy, then he can solve it directly with a cup without using a straw. This so-called? Best of both worlds? In fact, they just make themselves more troublesome.