Could you, please, check my sentences

[changeling]

Hi everybody!
Could you, please, check my grammar and vocabulary?


It is not only performing physical exercises that does us good, but also watching them. This fact has been discovered by physiologists at the University of Chicago. They conclude that watching somebody training helps to sharpen the brain.

Thanks in advance

[Anglika]

Hi everybody!
Could you, please, check my grammar and vocabulary?


It is not only performing physical exercises that does us good, but also watching them. This fact has been discovered by physiologists at the University of Chicago. They conclude that watching somebody training helps to sharpen the brain.

Thanks in advance

They look fine to me.