刘畊宏女孩必看：健身后为什么一定要拉伸，你的拉伸做对了吗？
Ugly Side Effects of Not Stretching After Exercise, Says Science

Science shows that stretching isn't actually literal—you're not even "stretching" your muscles at all. In fact, the true purpose of stretching is to lengthen and mobilize the connective tissue around your muscle, which does wonders for both your joints and your muscles. What's more, stretching helps your blood flow, reduces your risk of injury, helps you lose weight, and even relieves your stress.

1.You Could Feel Sick

You won't be surprised to know that when you exercise, you raise your heart rate for a period of time. While it's great to get that blood flowing, experts will tell you that it's just as important to "get your heart rate back to a normal level after the workout is over." This is also known in the fitness world as "cooling down."我们都知道运动时心率会升高。虽然这会加速血液流动，但专家表示，“锻炼结束后让心率恢复到正常水平”同样重要，这在健身界也被称为“降温”。

2.Your Muscles Will Likely Become Stiffer and More Sore

When you exercise your muscles, it produces an inflammatory response in the form of lactic acid, which is actually what causes your muscles to become sore. When you rest—or "recover"—in the time between bouts of exercise, your body naturally breaks down and gets rid of that lactic acid. One thing that helps your body dispose of that lactic acid? You guessed it: Stretching. Stretching helps your distribute oxygen throughout your body and muscles, which, according the Healthline, "can reduce lactic acid production and rid your muscles of any accumulation of lactic acid."当你锻炼肌肉时，肌肉会产生炎症反应释放乳酸，这是导致肌肉酸痛的原因。当你在两次锻炼之间休息“恢复”时，你的身体会自然分解并代谢掉这些乳酸。有没有方法可以帮助身体排出乳酸？你猜对了，答案是：拉伸运动。拉伸有助于将氧气分配到全身和肌肉，据Healthline网站称，拉伸“可以减少乳酸的产生，消除肌肉中积累的乳酸。”

3.You'll Be at Risk of Injury

According to the experts in the sports medicine department at UC Davis Health, inflexibility will cause you to have muscles that tire quicker and joints that are more prone injury, it will lead to "abnormal stress on structures and distant from the initial site of inflexibility" , and your weakened range of motion will lead to less blood and nutrients to your joints. In the case of the latter, it's why people often feel stiffness and pain in their "weight bearing" joints, such as the knees and hips.加州大学戴维斯分校医学中心运动医学系专家称，僵硬会导致肌肉更易疲劳，关节更易损伤，这将导致“结构上的异常应力，柔韧性会变得更差”，运动范围的缩小会导致关节的血液和营养供应减少。这就是为什么人们的“负重”关节（如膝盖和髋关节）经常感到僵硬和疼痛的原因。

Step one: "Walk for about 5 minutes, or until your heart rate gets below 120 beats per minute."

Step two, moving to stretching: "Hold each stretch 10 to 30 seconds. The stretch should be strong, but not painful. Breathe while you're stretching. Exhale as you stretch, inhale while holding the stretch."

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要点：站立，手臂伸直，轻轻按压以增加肌肉的伸展， 另一只手重复练习。

切记做拉伸时也要量力而行，如果你以前从来不做拉伸，不可能达成完全的伸展。但是随着时间推移，这种情况将会改善。