When you breathe in, your diaphragm contracts, pulling itself flat, and your external intercostal muscles between your ribs contract.

当你吸气时，你的横膈膜收缩，把自己拉平，肋骨之间的外部肋间肌肉收缩。

Before I dive, I go through a whole preparation and that will include stretching of the body, stretching of the lungs, the diaphragm, intercostal muscles.

在潜水之前, 我会做一个完整的准备活动，包括身体的伸展，肺、膈肌和肋间肌的拉抻。

In addition to the diaphragm, external intercostal muscles are muscles located on the outside of our ribs, and they expand the chest.

除了横膈膜，肋间外肌是位于肋骨外侧的肌肉，它们可以扩张胸部。

Before I dive, I'll go through a whole preparation and that will include stretching of the body, stretching of the lungs, the diaphragm, intercostal muscles.

在我潜水之前，我会做一个完整的准备工作， 包括伸展身体、伸展肺部、横膈膜和肋间肌。

And as soon as I move on top of the ribcage and between the intercostal muscles, which is softer and harder, I can feel the difference of the stiffness.

当我在胸腔顶部和肋间肌之间移动时，较软和较硬，我就能感觉到僵硬的差异。