I think I suffer from short-term muscle memory loss. Is that a real thing? I don't even know. All I know is that I don't swim on the weekends, and every Monday morning I feel like I'm starting over from scratch again!
No matter how great my swims are the rest of the week - and Fridays I usually push myself even harder - Monday morning is always the same. By the end of the workout I'm in slightly better shape, but for the whole first half at least, I'm slow and have to focus on every breath. My arms feel like they weigh a thousand pounds, and I sometimes forget to move my legs at all! It would be comical if it weren't so frustrating!
I guess it's not a huge deal, as long as I'm still able to complete a decent workout, and the rest of the week feels much better. It just has caught me off guard because I don't remember running being like this. There were always some rough days here and there, but they didn't seem to fall on specific days of the week or after a certain number of days of rest. And it never felt like I forgot how to run. It just felt more difficult.
So I don't know what my deal is. Maybe this is happening because I'm still so new at swimming? Maybe in a few months, my Monday swims will feel as normal as any other day of the week. Until then, I guess I'll just keep flopping around like a fish on a hook every Monday morning. It's just one more reason to wish the weekends would never end. :)