The result of constant muscle tension and stiffness of joints, many of them are avoidable, and simple flexibility training can prevent these by making muscles stronger and keeping joints lubricated (润滑 ).
出自-2013年6月阅读原文
According to a German professor, the soreness comes from straining your muscles in an uncommon way, for example, jumping on a bicycle for a ride, because you haven't ridden in a long time.
2019年12月四级真题（第一套）听力 Section C
After tough workout or a day full of physical activity, it's common to find your muscles aching, but where do these pains come from?
2019年12月四级真题（第一套）听力 Section C
As if you needed another reason to hate the gym, it now turns out that exercise can exhaust not only your muscles, but also your eyes.
2017年6月四级真题（第三套）阅读 Section A
During 26 vigorous exercise, our muscles tire as they run out of fuel and build up waste products.
2017年6月四级真题（第三套）阅读 Section A
first, the body must realize the muscles are damaged.
2019年12月四级真题（第一套）听力 Section C
It takes about a day until these cells make it to your aching muscles.
2019年12月四级真题（第一套）听力 Section C
Mules have strong muscles like horses; but they eat less, can work longer, and are gentler, like donkeys.
2017年6月四级真题（第一套）听力 Section C
Soreness occurs since your leg muscles aren't used to that movement.
2019年12月四级真题（第一套）听力 Section C
When muscles perform an activity they aren't regularly expose to, the tiny fibers that are inside them are being torn apart.
2019年12月四级真题（第一套）听力 Section C
When the body realizes the muscles are hurt, the response is to increase blood flow to the area and increase body heat, damaged cells are then cleaned up and the body sends cells specially designed to break down the large muscle fiber fragments.
2019年12月四级真题（第一套）听力 Section C
Already it is known that bones, muscles and nerves develop faster in baby girls.
出自-2012年12月听力原文
Additional protein was found to help strengthen the muscles of overweight seniors seeking weight loss.
2019年12月六级真题（第二套）阅读 Section B
At around age 60, "muscles really start to break down," says Kathryn Starr, an aging researcher, "and because of that, the protein needs of an older adult actually increase.
2019年12月六级真题（第二套）阅读 Section B
Extreme athletes expend lots of energy breaking down and repairing and building muscles.
2019年12月六级真题（第二套）阅读 Section B
It helps build nails, hair, bones and muscles.
2019年12月六级真题（第二套）阅读 Section B
Older adults need to take in more protein to keep their muscles strong.
2019年12月六级真题（第二套）阅读 Section B
Protein can speed the repairing of damaged muscles.
2019年12月六级真题（第二套）阅读 Section B
Starr recently conducted a small study that found that adding extra protein foods to the diet of obese older individuals who were trying to lose weight strengthened their muscles.
2019年12月六级真题（第二套）阅读 Section B
The marketing is tempting: Get stronger muscles and healthier bodies with minimal effort by adding protein powder to your morning shake or juice drink.
2019年12月六级真题（第二套）阅读 Section B
Eventually, the couple found that their bodies turned for the better, with re-found strong muscles that they.
2018年高考英语江苏卷 完形填空 原文
I actually began to build up my arm muscles肌肉 shaking my set.
2015年高考英语全国卷2 阅读理解 阅读A 原文
If you exercise out of doors,your body will learn to breathe more deeply,allowing even more oxygen to get to your muscles and your brain.
2019年高考英语全国卷I 阅读理解 七选五 原文
Secondly, their muscles grew smaller and weaker.
2019年高考英语江苏卷 阅读理解 任务型阅读 原文
Such start-up fatigue is very real, even if not actually physical, not something in our muscles and bones.
2016年高考英语天津卷 阅读理解 阅读D 原文
To avoid knee pain, you can run on soft surfaces, do exercises to strengthen your leg muscles, avoid hills and get good running shoes.
2018年高考英语全国卷I 语法填空 原文
In fact, instead of straining muscles to build them, as exercise does, laughter apparently accomplishes the opposite.
2011年考研真题（英语一）完形填空 Section Ⅰ
It turns out that the brain needs exercise in much the same way our muscles do, and the right mental workouts can significantly improve our basic cognitive functions.
2014年考研真题（英语一）完形填空 Section Ⅰ
Studies dating back to the 1930's indicate that laughter relaxes muscles, decreasing muscle tone for up to 45 minutes after the laugh dies down.
2011年考研真题（英语一）完形填空 Section Ⅰ
Those forced to exercise their smiling muscles reacted more enthusiastically to funny cartons than did those whose mouths were contracted in a frown, suggesting that expressions may influence emotions rather than just the other way around.
2011年考研真题（英语一）完形填空 Section Ⅰ