Finally, we discussed twitch summation versus tetanus, and isotonic vs. isometric movements.

最后，我们讨论了抽搐总和与，及等张运动与等长运动。

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是如何发生，让我们看看我们两种主要口味：等张和等长。

And 3% sodium chloride being saltier than isotonic 0.9% saline.

3%氯化钠浓度高于0。9%生理盐水。

If the temporal and recruitment summation triggers enough muscle tension in my arm to overcome the weight of the load and lift the mug, changing the length of the muscles involved during contraction, than that is an isotonic movement.

如果时间和招募总和触发了我手臂上足够肌肉张力来克服负荷重量，举起杯子，改变收过程中肌肉长度，那么这就是一个等张运动。