Do some days we just don't have it?

I've been shooting exceptionally well lately and was really excited about doing alot of shooting this weekend.. Finally had a Saturday without work..... Well, I got the old bow out and shot about 10 arrows working on form.... Right from the get go I knew something just didn't feel right..... Felt too stiff and not smooth at all...... My bow arm was unusually weak and shaky from the get go.....After my form work, I started shooting spots.... It was horrible... Spraying them all over the target....[:@]

Never could get a decent group together and I was missing BAD, like 8+ inches.... Can't figure it out.... The only thing out of the norm was I did spend a little over an hour push mowing my yard.. Maybe my arms were just too tired? I don't know, but it sure is discouraging