CrimsonKing said:I disagree ... I think the flaw is in the examples you use.
Variation in exercise does lead to continual adaptation but this is primarily form variation in speed, volume, cadence, and intensity of weight as related to your 1 rep max.
That is one of the fundamentals of Westside Barbell Training
I totally agree. I dont know how many studies I see of adaptation to exercise.
First, there are different types of muscle fibers. Fast and slow. Fast are only good for about 2-3 reps, depending on the person. And slow compose the rest of the lifting per set. So if you always did 3 reps, you would only hit roughly 10%(in most people) of the fibers in any given muscle. We all know that a muscle fiber contracts and only one specific force, the only difference between a one rep max and a ten rep max is that ALL THE FIBERS in the muscle are recruited for the one rep, whilst about 20% are recruited for 2 reps on the 10 rep set. Basically what I am saying that its imperative to vary, volume, reps, and most important exercise's to develope the most you can.
I wont even get into the different types of energy (ATP, Creatine Phosphate, Glycogen) that muscles use at different levels of exaustion.