Basically, you'll choose sets of exercises themed around certain muscle groups, like shoulders or lower body.

一般可以选择以特定肌肉群为锻炼目标的运动，比如肩膀或下半身。

And in addition, the CDC says we should work out all major muscle groups twice a week.

此外，疾控中心称，我们应该每周锻炼两次所有主要肌肉群。

This muscle group also contains two types of muscle fibers to refine our motions even further, slow-twitch and fast-twitch.

这种肌肉组也包含两种肌肉纤维，以慢转换和快转换的方式进一步改善我们的活动。

The government also recommends strength training at least twice a week and working all major muscle groups when we do.

政府还建议每周进行两次计量锻炼，锻炼主要的肌肉。

You're training a subset of muscle groups on one day and then a different subset the next day.

你一天锻炼肌肉群的一部分，然后第二天锻炼不同的部分。

Swimming exercises all the major muscle groups.

【exercise】游泳能使身体所有的主要肌群得到锻炼。

The first are less obvious and only involve a few muscle groups.

第一个不太明显，只涉及少数肌肉群。

Twisting your body into yoga's physical postures stretches multiple muscle groups.

将您的身体扭转成瑜伽的身体姿势可以拉伸多个肌肉群。

In this procedure, a neurosurgeon re-routes the nerves that control the arm muscles to another muscle group.

在此过程中，神经外科医生将控制手臂肌肉的神经重新路由到另一个肌肉群。

These single-joint isolation exercises, like curls, side raises, and triceps pushdowns, only tend to focus on one muscle group at a time.

像弯举，侧平举还有三头肌下推都是单关节局部训练，它们只专注于锻炼一个肌肉群。

But as the toxin spreads, stronger muscle groups become more rigid, leading to a frightening arching of the back.

但随着毒素的扩散， 较强的肌肉群会变得更加僵硬，导致背部出现可怕的拱起。

The balance of two muscle groups in the iris changes how big your pupils are, like a camera aperture.

虹膜中两个肌肉群的平衡会改变你的瞳孔大小， 就像相机光圈一样。

When more muscle groups are involved or vocalizations are a bit more elaborate, that's when tics are considered complex.

当涉及更多肌肉群或发声更加复杂时，抽动就被认为是复杂的。

Large compound movements, like squats, deadlifts, and shoulder presses, however, hit multiple muscle groups at once, meaning more work in significantly less time.

而复合训练，像深蹲，硬拉，肩部推举，可以同时锻炼多个肌肉群，这意味着能在更少时间内做更多的锻炼。

And because there are glycine receptors that help signal to opposing muscle groups, it can help you control automatic reflexes from surprises or startles.

因为有甘氨酸受体帮助向相反的肌肉群发出信号，它可以帮助你控制意外或惊吓的自动反射。

Progressive muscle relaxation — tensing muscle groups as you inhale and relaxing them as you exhale — has been effective for reducing nightmares.

渐进式肌肉放松——吸气时拉紧肌肉群，呼气时放松——对减少噩梦很有效。

Then, as more complexity developed in organisms and creatures needed a basic way to signal motion in muscle groups, they already had glycine receptors ready to go.

然后，随着生物体越来越复杂，生物需要一种基本的方式来发出肌肉群运动的信号，它们已经准备好了甘氨酸受体。

So it's the same muscle groups that we use, this muscle that we need, the glutaeus and the quadriceps, to really extend both joints at the same time.

这就是我们用的肌肉群，我们需要的这块肌肉，臀肌和股四头肌，同时伸展两个关节。

And also to have different muscle groups balanced, so, you know ... For example, oftentimes our quads are really strong, but the hamstrings are weak.

还要让不同的肌肉群保持平衡， 所以，你知道… … 例如，通常我们的股四头肌非常强壮， 但腿筋却很弱。

For deep muscle relaxation, you will tense then relax the major muscle groups of your body, beginning with your feet and working your way towards your head and face.

对于深层肌肉放松，你会绷紧然后放松身体的主要肌肉群，从你的脚开始，一直到你的头和脸。