Your massage therapist knows that your back muscles are tighter than the strings on a ukulele; your shrink knows that half your tension comes from stress.
你的按摩师知道你的背部肌肉比女高音尤克里里琴弦还紧；你的心理医生会说你的紧张有一半来自于压力。
I have sprained my back muscles.
我背部肌肉扭伤了。
Strengthens the lower back muscles and loosens the spinal vertebrae.
强健后腰肌群，放松脊椎。
Burrow the tailbone down toward the floor, and keep your back muscles soft.
椎骨尽量靠向地板方向以使背部肌肉保持柔软。
His back muscles are so strong; no wonder he swims the butterfly stoke so well.
他背部的肌肉那么结实，难怪蝶泳游得那么好。
To exercise the core muscles while toning the back muscles and the shoulder muscles.
锻炼腹部(核心区)肌肉和肩部肌肉。
Inhale and lift upper back using back muscles while moving forearms outward until parallel.
吸气并用背部的肌肉抬起上背部，同时移动前臂向外直到平行。
Constantly holding that extra 20-pound weight forces your neck and back muscles to work overtime.
不停地承受着这额外的20英镑，你的脖子和背部肌肉会超时工作。
Repeat this up-down movement on the left side 10 times, or until your waist or back muscles begin to tire.
重复这个起来、放下、向左的动作10次，或者直到你的腰部或背部肌肉开始觉着累了。
Nathan: What do I do at the gym? I try to work on specific back and lower back muscles but it's quite difficult.
纳山：我在健身房做什么？我通常专门练背肌和腰背肌，不过非常难。
You'll also work on your flexibility, as the gliding motion stretches your hamstrings, calves and lower-back muscles.
您也可以提高柔韧性，因为滑行拉伸您的大腿，小腿和腰部肌肉。
From head on, you can see how throwing up the pinky gives me the wider pull, and gets my back muscles into the stroke.
从头上方看，可以看到转肩送肩让我能把小拇指送出水面（这个动作）给了我更宽的划水，并且让背部的肌肉也参与其中。
Objective Using surface electromyography (SEMG) technique to evaluate repetitive lifting task induced fatigue of back muscles.
目的应用表面肌电信号(SEMG)技术对重复性搬举所致的竖脊肌疲劳进行评价。
The culprit may be weak back muscles, the type of surface on which you run, the shoes you wear, or the length of your running stride.
其原因可能是背部肌肉太弱，也可能是你奔跑的路面有问题，还可能是你穿的鞋不合适，也许是因为你的步幅不对。
With a new swim season about to begin, it's time to start strengthening your shoulders and back muscles BEFORE you have a problem.
又一轮新的游泳季节即将到来，在遇到问题之前，该是我们加强肩膀和背部肌肉的时候了。
For example, tense lower-back muscles can contribute to piriformis syndrome which in turn can cause inflamation of the sciatic nerve.
腰背部肌肉长期紧张可以导致梨状肌症候群，梨状肌的问题反过来又可以导致坐骨神经炎。
This result suggested that the projection of the spinal motoneurons was able to dichotomize to the femoral nerve and low back muscles.
结果提示脊髓前角运动神经元具有分支分布至腰背肌和股神经的现象。
Biomechanical characteristics of spine change after the fusion, which will probably induce dysfunction of back muscles in scoliosis patients.
脊柱的生物力学性质在融合后会发生改变，这种变化可能导致背部肌肉功能异常。
If your bed doesn't give enough support, back muscles and ligaments work all night trying to correct spinal alignment, so you wake up with a tired aching back.
如果你的床不能有力的支撑，肌肉和韧带一夜设法纠正脊柱拉直。你醒后会背痛疲劳。
We compare the skeletons of the two animals and Baily states his case - that these spikes aren't spikes but strong thick bones to support the massive back muscles of a hump.
我们对这两种动物的骨骼进行比较，贝利向我们讲述他的案例，这些刺其实并不是刺，而是用来支撑带有厚重肌肉的峰的坚实粗大的骨骼。
We compare the skeletons of the two animals and Baily states his case - that these spikes aren't spikes but strong thick bones to support the massive back muscles of a hump.
我们对这两种动物的骨骼进行比较，贝利向我们讲述他的案例，这些刺其实并不是刺，而是用来支撑带有厚重肌肉的峰的坚实粗大的骨骼。
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