I haven't gotten stout and fat. I exercise. I get eight to nine hours of sleep every night and I've stayed married to the same girl for 66 years, which is important to have a good companion.

每日睡眠8到9小时，我就娶了一个姑娘，并且我们的婚姻已经持续了66年，有一个好的生活伴侣很重要。

youdao

In between fighting, the wrestlers practise an exercise known as bukari-geiko, in which one wrestler throws himself at his ready companion and drives him from one side of the ring to the other, completing the exercise only when the inactive rikishi has been driven out of the dohyo.

BBC: The life of a sumo wrestler

After collecting the data, an exercise regiment would be designed using a piece of companion software.

ENGADGET: vi-RABT improves ankle rehabilitation with virtual reality and robotics