60秒科学:Vitamins Block Some Exercise Benefits
Exercise is good for you. Antioxidants are good for you. But put them together and it’s not as good as you’d think. Because a recent study shows that some vitamins block the beneficial effects of exercise.
A good workout not only gets your heart pumping, it makes your body better able to process glucose 1 and decreases your risk of diabetes 2. And it does so, in part, by firing up your cells’ mitochondria. Stoking those mitochondrial flames boosts your metabolism 3. But it also throws off so-called free radicals 4, which are usually considered harmful. So adding antioxidants—which get rid of free radicals—should make your workout even healthier, right?
Well, no. Forty men took part in a four-week training program. Half the group also received daily doses of Vitamins C and E. The researchers discovered that exercise on its own improves insulin sensitivity, which keeps diabetes at bay. But taking the vitamins erased 5 that gain—findings that appear in the May 12th issue of the Proceedings 6 of the National Academy of Sciences.
So you actually need a burst of potentially damaging radicals to reap some of the important rewards of a good sweat. Which means that even on a molecular 7 level: no pain, no gain.
—Karen Hopkin
- I gave him an extra dose of glucose to pep him up.我给他多注射了一剂葡萄糖以增强他的活力。
- The doctor injected glucose into his patient's veins.医生将葡萄糖注入病人的静脉。
- In case of diabetes, physicians advise against the use of sugar.对于糖尿病患者，医生告诫他们不要吃糖。
- Diabetes is caused by a fault in the insulin production of the body.糖尿病是由体內胰岛素分泌失调引起的。
- After years of dieting,Carol's metabolism was completely out of whack.经过数年的节食，卡罗尔的新陈代谢完全紊乱了。
- All living matter undergoes a process of metabolism.生物都有新陈代谢。
- Some militant leaders want to merge with white radicals. 一些好斗的领导人要和白人中的激进派联合。 来自《简明英汉词典》
- The worry is that the radicals will grow more intransigent. 现在人们担忧激进分子会变得更加不妥协。 来自辞典例句
- He erased the wrong answer and wrote in the right one. 他擦去了错误答案，写上了正确答案。 来自《简明英汉词典》
- He removed the dogmatism from politics; he erased the party line. 他根除了政治中的教条主义，消除了政党界限。 来自《简明英汉词典》
- He was released on bail pending committal proceedings. 他交保获释正在候审。
- to initiate legal proceedings against sb 对某人提起诉讼