Isometrics are exercises employing static muscle contractions.

静力训练是一种使用静态肉收缩的运动。

Muscle contraction can be split into three main types.

肉的收缩分为三种主要类型。

They directly and efficiently convert electrical energy into muscle contractions.

它们直接高效地把电能转化成肉收缩。

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

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.

这些活把来自营养素的化学能量高效地转化为肉收缩。

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中间神经元释放的神经递质，会导致不受控的肉收缩痉挛。

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

盐调节神经脉冲的传递、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.

为了更好的理解无力，我们从细胞水平来了解一下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.

通过肉收缩扩散色素细胞，章鱼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，低钾血会影响心收缩，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，也影响心细胞收缩，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肉收缩的问题，累及平滑、骨骼或心。

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

当这种情况发生时——最终会发生的——我们称之为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.

放松疗法放松膀胱及抗毒蕈碱药物减少逼尿收缩。

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

你能会抽搐，但这并不意味着那里 是你的生命，这些只是肉收缩。

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

但马钱子碱是种神经毒素，作用在脑与脊髓的神经细胞。同样也是控制肉收缩。

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

呻吟指的是便秘和肉无力，而这两种情况的部分原因是肉收缩减弱。

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。