When I wanted to join the forces (back when I was 30) I started to do the usual... 180 pushups and situps every night. It made my GMT (you folks call it basic training) go by quite easily. I couldn't believe that I was in better shape than the 17 and 18 year olds I was training with.
Fast forward to 10 years after my stint was done and I had put on a few (30) pounds and I was out of shape. So.... I stopped eating all the white crap that helped me build a flabby body. I cut out bread, potatoes and rice. I also started walking again. I lost 30 pounds in about 2 month and than I started taking a martial arts/aerobics course call Krav Maga. It busted my balls like PT in the forces and I loved it.
I have fallen by the wayside again (I turned 49 yesterday) but I am still in better shape than alot of people I know. I will likely get back into Krav to tone my body and lose about 15 pounds (or turn it into muscle since I am 5'11 and weigh 180 pounds. For me it was simply just suck it up and do it. I hope it will be as easy for you!
1970 Mercedes Unimog
2004 F150 Heritage Supercab
1974 Holiday 17' Travel Trailer
It's not about the truck and it is not about the distance traveled. Get out there with whatever you have, meet people and see things. Push the envelope of your comfort zone and live.