I thought for a year, I don't need power hour, what's the point? Then I got it and used it all last summer, and wow! It hardened up and compacted all the muscle I'd been building with pure strength and slow and heavy.
Here's my 1st grade understanding of something Meredith explained on the boards. You have fast twitch and slow twitch muscle fibers. By using both endurance and heavy weight workouts, you make sure ALL of your fibers are being stimulated to grow, grow, grow. And if you're someone who has more slow twitch fibers, you may actually see more muscle growth from an endurance workout.
That was news to me.
Also, the posture development from this workout is amazing.
Millie