Isometrics are exercises employing static muscle contractions.

静力训练是一种使用静态肌肉收缩的运动。

Muscle contraction can be split into three main types.

肌肉的收缩可以被分为三种主要类型。

They directly and efficiently convert electrical energy into muscle contractions.

它们可以直接高效地把电能转化成肌肉收缩。

Muscle contraction, transporting molecules throughout the body, synthesizing DNA, etc.

肌肉收缩，在全身运输分子，合成脱氧核糖核酸等。

These living muscles efficiently convert chemical energy that comes from nutrients into muscle contractions.

活肌把来自营养素的化学能量高效地转化为肌肉收缩。

The patient has to be able to produce two independent signals or, or muscle contractions.

病人必能够产生两个独立的信号或肌肉收缩。

But by blocking neurotransmitters released by interneurons, tetanus toxin causes uncontrollable muscle contractions and spasms.

但破伤风毒素通过阻断经元释放的经递质，会导致不受控的肌肉收缩痉挛。

It regulates nerve impulses, muscle contractions and maintains the body's balance of water and minerals.

盐可以调节经脉冲的传递、肌肉收缩，并维持体内水分和矿物质的平衡。

To better understand myasthenia gravis, let's review normal muscle contraction but at the cellular level.

为了更好的理解重症肌无力，我们从细胞水平来了解一下肌肉正常收缩时的状态。

Muscle contraction expands the chromatophores and helps them change the skin color to match its surroundings.

通过肌肉收缩扩散色素细胞，章鱼以此改变自身肤色融入周围环境。

Finally, hypokalemia can affect cardiac muscle contractions, which can lead to cardiac arrhythmias and cardiac arrest.

最后，低钾血症会影响心肌收缩，导致心律失常和心搏骤停。

Hyperkalemia, though, also affects cardiac muscle contractions, which can lead to cardiac arrhythmias and cardiac arrest.

高钾血症，也可以影响心肌细胞收缩，进而导致心律失常和心脏停搏。

During an asthma attack, calcium flows into the cells of the airway and contributes to muscle contraction.

原来哮喘发作时，钙流进气道细胞，于是导致肌肉收缩。

Low potassium levels leads to issues with muscle contractions, which could be smooth, skeletal, or cardiac muscles.

两种途径的低钾水平都会导致肌肉收缩的问题，可累及平滑肌、骨骼肌或心肌。

When this happens — and it will, eventually — it's called the sliding filament model of muscle contraction.

当种情况发生时——最终会发生的——我们称之为肌肉收缩的滑动纤维模型。

Relaxation techniques to relax the bladder as well as antimuscarinic medications can decrease detrusor muscle contractions.

放松疗法放松膀胱以及抗毒蕈碱药物可减少逼尿肌收缩。

You may twitch, but this doesn't mean there is life in you, these are just muscle contractions.

你可能会抽搐，但并不意味着那里 是你的生命，只是肌肉收缩。

But the threat here is a neurotoxin that affects the nerves in the spinal cord that control muscle contraction.

但马钱子碱是种经毒素，作用在脑与脊髓的经细胞。同样也是控制肌肉收缩。

Groans is for constipation and muscle weakness, both of which are partly due to decreased muscle contractions.

呻吟指的是便秘和肌肉无力，而两种情况的部分原因是肌肉收缩减弱。

Now that we know how muscle contractions happen, let's look at our two main flavors: isotonic and isometric.

现在我们知道了肌肉收缩是如何发生的，让我们看看我们的两种主要口味：等张和等长。