Q: Just read The Ultimate Power-Density Mass Workout. Absolutely great! I read it all in one sitting. It really made me think, so I’m redesigning my workout using your programs. But don’t higher-rep warmup sets cover the endurance component of the 2A fibers? And what about X Reps? They extend a set, so I would think they also affect the endurance side of the important 2As as well.
A: You’re right on both counts—to a degree. Warm-up sets aren’t intense, so very few fibers are involved—and many that are fall into the slow-twitch category, rather than the important fast-twitch 2As. [Read more…]