Skipping excersise is really good for me?

Hey, I thought physical excersise was good for everybody. Tonight I
was going to swim, but a few minutes before I'm going to start getting
ready for that, I hear in the TV that they're saying I shouldn't do
excersise three hours before going to bed?

Okay, so what should I do as a consolation for my disappointment? Ah,
yeah! I know, I'll go get myself a huge chocolate ice cream!