I also have fallen into the lazy lifestyle. It was most notable when I was working in the yard with my 68 year old neighbor. I was huffing and puffing and he was sailing along! I just got outworked by someone's granddaddy!
I got a tire to do tire tosses, and I'm going to start doing tabata training on my speedbag. I also need to get another road bike to do internals on. Ultimately, I just need to get off my @$@%.