The chief function of the muscles of the back when one is erect is to resist gravity.
一个站立的人的肩肌的主要功能是抵抗重力。
This exercise will work the muscles of the lower back.
这样的运动可以锻炼腰部的肌肉。
To stand, you have to tense your leg muscles, and engage the muscles of your back and shoulders; while standing, you often shift from leg to leg.
要站起来，你必须使你腿上的肌肉拉紧，你背上和肩上的肌肉也要参与；站着的时候，你的腿常常会转来转去。
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。
That way your back muscles are prepared for the shock of the backward pull.
这样你的背部肌肉就为弓起身子做好了准备。
The Achilles tendon is a strong fibrous cord that connects the muscles in the back of your calf to your heel bone.
阿基里斯腱是将小腿后部的肌群连接到跟骨的强健的纤维索。
The brain then has to decide what to do, and sends its orders to the muscles of the arms, legs, and so on, so that the ball is met and hit back where the player wants it to go.
接着大脑得决定怎么办，并立即将其命令传达给手臂、腿等人体部分的肌肉，结果球被击回到运动员希望它着落的地方。
The brain then has to decide what to do, and sends its orders to the muscles of the arms, legs, and so on, so that the ball is met and hit back where the players wants it to go.
接着大脑决定怎么办，立即将命令传达给手臂、大腿等处的肌肉，结果球被击回到运动员希望它着落的地方。
His arm went along the back of the bench, not quite around her shoulders, but she felt his muscles.
他的手臂靠在椅背上，没有搂住她的肩膀，但她仍能感觉到他的肌肉。
The hamstrings are three long muscles that cover the back of the thighs.
腘绳肌是覆盖大腿后侧的三条长条形肌肉。
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。
Achilles tendinitis is inflammation of the Achilles (uh-KIL-eez) tendon, the band of tissue that connects calf muscles at the back of the lower leg to your heel bone.
阿基里斯腱炎(译者：跟腱炎)是阿基里斯腱发生的炎症反应，阿基里斯腱是指将小腿后部的腓肠肌连接到跟骨上的一条组织。
The parts of the body that require special attention are the muscles of the shoulder and arms, abdomen and back, legs, and the heart, lungs and blood vessels.
锻炼期间我们要注意肩部，手臂，腹部，后背，腿部的肌肉，以及心脏，肺和血管。
For example, if you accidentally touch a hot stove, the nerves in your skin shoot a message of pain to your brain. The brain then sends a message back telling the muscles in your hand to pull away.
比如你不小心碰到了热火炉，你皮肤中的神经就会向大脑发射疼痛信号，于是大脑就会发回信号让手挪开。
Jaw muscles can provide about 200 pounds of force to bring the back teeth together for chewing.
颚肌可提供约200磅(90.72公斤)的力量，以便臼齿合拢咀嚼。
The back is supported by a large, complex group of muscles that hold up the spine, including the extensor, flexor, and oblique muscles.
腰部由维持脊柱的强大的复杂的一组肌肉支撑，包括伸肌、屈肌、斜肌。
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。
Yoga comprises of some simple and effective body movements, which strengthen one's back, tones the stomach muscles, and reallocate body weight.
瑜伽体式由一些简单有效的身体动作组成，这些动作加强人的背部，调节胃部肌肉，重新分配身体的重量。
Back in the operating room, having divided the liver, the doctors cut through the girls' abdominal muscles and started on the last strip of skin that connected them.
手术室里，已经完成了肝脏分离的医生切开姐妹俩的腹部肌肉，开始处理把两人联结在一起的最后一块皮肤。
All tension is being dissolved away from the muscles down the back of your neck.
所有的紧张压力都消失了，随着你身体脖子后的肌肉放松而消失了。
Muscles spanning the upper back, the middle trapezius and rhomboids, pull the shoulder blades towards the spine to open the front of the chest.
中斜方肌和菱形肌(贯穿上背部的肌肉)将肩胛骨向脊柱的方向拉，从而打开胸廓。
Conclusion Systematic rehabilitation excises promote the recovery of the strength of the leg muscles, ROM, and ADL, which make the patients get excellent knee function, go back to work early.
结论关节镜下前交叉韧带重建术后的系统康复对患者肌力、ROM、ADL的恢复具有重要意义，有利于患者早日恢复膝关节功能，重返社会，恢复原工作。
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。
This temporarily blocks signals that pass through the nerves to the muscles of the body and back to the brain.
这就暂时阻塞了通过神经传递到肌肉或传递回大脑的信号。
Objectives: to evaluate the function of respiratory muscles and conduct the correlative analysis in patients with chronic low back pain (CLBP).
目的：评价慢性下腰痛(CLBP)患者的呼吸肌功能并进行相关因素分析。
Nathan: I have a physio and they advised me that one of the problems I have with my back is that the muscles get tired and there's like a vicious circle.
纳山：我有一个理疗师，他说我后背的问题是肌肉疲劳，而且一直在恶性循环。
Lower back strain is acute pain caused by damage to the muscles and ligaments of the back.
腰扭伤是腰部的肌肉、韧带受伤引起的急性疼痛。
Lower back strain is acute pain caused by damage to the muscles and ligaments of the back.
腰扭伤是腰部的肌肉、韧带受伤引起的急性疼痛。
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