All it takes is a day out in the yard to make you appreciate the amount of work that goes into gardening and landscaping. Chopping, cutting, lifting, carrying, hauling, dumping, throwing and more. Not a single muscle left out and every little movement meant something. Functional fitness at its core. Not only a nice departure from structured exercise but also outdoors in the sun. Doing work to maintain your residence/habitat is about as natural, traditional, primal and universal as you get.