I know not all are bodybuilders. Another good way to build your strength though is to work. Seriously. Shoveling manure and cleaning out pens/shoveling snow fairly often also really helps, and it trains your back to be able to handle work with IMperfect form. along with carrying buckets of water, etc. a lot of farms will hire people to work, and they will pay you, and you get exercise out of it too. I do run in cross country
