1. everything works for a while. Everything will improve your performance for some period of time, then you will adapt to it
2. Hard work beats all. If the exercise is hard, brutally hard, you are going to improve. Pushing the stimulus boundaries of your body, will make it change and improve
3. If you aren't a little scared of the program, write a new one. This one follows the one above, if you go into your workouts calm and collected, and you don't have to convince yourself you really should be doing this, it isn't hard enough to make changes in your body or how it moves.
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