The equipment will be drenched in particles. While there is a suggestion that sweat can actually act as a barrier to viruses, heavy exercise will still expel more particulates. A mask is a barrier, but is not impenetrable. By that I am in no way suggesting that they should not be worn; I have been using them for months. It is just that they are not a 100% prevention.Wear a mask.
The virus is not transmitted via sweat.
Change at home.
Remember that a lot is still being learnt about the virus. There is now a sugestion that it can be transmitted in semen, although it is early days.