If we are hiking on the top of a snowy mountain, the rising demand for oxygen from our body is met as soon as our kidney responds by secreting a type of hormone into the blood.

如果我们在雪山的山顶上徒步旅行，当我们的肾脏通过向血液中分泌一种激素而做出反应时，我们身体对氧气不断增加的需求就会得到满足。

The increase in muscle mass also means that there is a greater demand for oxygen, and, to make things even worse, the coronaries get squeezed down by the this extra muscle so that even less blood's delivered to the tissue.

肌肉量的增加也意味着心脏对氧气有更大的需求，雪上加霜的是，冠状动脉会被多余的心肌挤压，造成供应到心脏组织的血液变少。