I haven't seen this approach before, and I like the idea of it. Dunno if it fits for all goals though. Would it be effective if you just measured total hours?
Yes, but 1 hour is quite a big quantum (if you work out for 55 minutes, then stop, then what — all effort is lost?) Measuring minutes is better.
Another thing: the goal should be quite bold, bigger than you'd think first (something you can think of reaching in 2-3 years; don't worry, it will be faster). Some examples: do 10,000 push-ups. Save $100,000 (or give $100,000 to charity, whatever suits you best). Run 2,000 kilometers. You start slow, but your progress accumulates, and then accelerates.
Another thing: the goal should be quite bold, bigger than you'd think first (something you can think of reaching in 2-3 years; don't worry, it will be faster). Some examples: do 10,000 push-ups. Save $100,000 (or give $100,000 to charity, whatever suits you best). Run 2,000 kilometers. You start slow, but your progress accumulates, and then accelerates.