The banned substance is thought to be the blood booster EPO.

据悉这种被禁药物是促红细胞生长素。

Asbel Kiprop is a Kenyan runner banned in 2019 for failing an EPO test.

阿斯贝尔·基普罗斯是一名肯尼亚跑步运动员，因未能通过EPO测试而于2019年被禁赛。

Lance Armstrong said, also that he only used a little bit of EPO previously.

兰斯阿姆斯特朗表示, 还说他之前只服用过一点点EPO。

Steroids, erythropoietin (EPO) and newer, less familiar performance-enhancing drugs (PEDS) will have bulked their muscles, enriched their blood and allowed them to train harder than unenhanced humans would find possible.

类固醇、促红细胞生成素(EPO)和更新的、不太为人所知的提高体能的药物(PEDDS)能够让服用者的肌肉更加强健，血液更加丰富，如此他们就能够比普通人类更加努力地训练。

As with EPO, says Dr Tucker, the idea is to improve the all-important power-to-weight ratio- but by tinkering with the " weight" side of the equation instead of the " power" side.

塔克博士表示，与促红细胞生成素一样，这种方法的目的是提高能量体重比，这至关重要——不过是在等式的“重量”一侧而不是“能量”一侧进行修补。