SRS, I also use home tasks for part of my fitness. What a structured workout could add for you is balancing muscle groups and flexibility that those home based things tend to miss. For every muscle we use in one direction, there are other opposing muscles that also need their turn. Very hard to describe, but say one set of muscles pushes, another set pulls. Or picture someone who does a lot of lifting but doesn't work on flexibility-- they'd have a hard time hanging from monkey bars.

I'm sort of desperately awaiting my card, so I can oppose water in all directions. One balance I need I know I need is more core work to balance my walking muscles.

~S~