If you knew anything about powerlifting you'd know that many elite natural/clean athletes train high frequency. You obviously weren't familiar with Sheiko. I personally know some powerlifters who do very well with high frequency, lifetime natural lifters. Juicers do better with less frequency because protein synthesis is artificially elevated for longer periods of time. When I was a beginner I was sometimes sore for 10-14 days (believe it or not) after a hard leg workout. Does that mean every 14 days is the minimum I need to rest between workouts? No, the body adapts and you get less and less sore over time.
Soreness doesn't mean "tearing muscle". And even if it did, the fact that you stop getting sore after increasing frequency means the body adapts to the demands placed on it.
I know plenty about powerlifting as I incorporate a lot of it into my workouts. Being a Mesomorph body type, I can NOT follow the routine of an ectomorph whose body is slender and muscular like a track and field runner and allows them to engage in long endurance type workouts or frequent workouts hitting the same muscle groups. My workouts must be short, hard, intense and allow for adequate rest. NO POWERLIFTER WORKS OUT FREQUENTLY OR HITS ANY PART MORE THAN ONCE PER WEEK.
All of this nonsense being spoken in this link about the body growing in 3 days and adaptation is being spoken by obvious idiots. If a person was to work one body part then the body may be able to adequately heal that one part in three days. However working out is never a one body part ordeal. Monday maybe legs, Tuesday shoulders, Wednesday back, Thursday Chest, Friday arms...While the body may be healing the damage done to the legs from Mondays workout, a person has already begun damaging the tissue of the shoulder with Tuesday's work out; while the body is working on healing the shoulders while it is still repairing legs, the person is damaging that back muscles on Wednesday etc etc. So it is impossible to do one body part multiple times per week without taxing the body too much, because the body is in a constant state of repair and doing too much will overwhelm it.
The mentality that your body adapts to training no matter how much you do is like saying a person adapts to drinking over time no matter how much they drink....NO...WHAT HAPPENS IS THEY DEVELOP PERPETUAL DRUNKEDNESS AND THEN CIRROSIS OF THE LIVER AND DIE. With over training you develop tendinitis, injuries, tissue damage and sadly eventually end up in SURGERY...now who wants that?
I hope those who are reading this have enough brains to NOT follow such advice as is given in regards to OVERTRAINING. For those who are JUICING maybe your "CHEMICALS" make you feel invincible, but I guarantee you they will catch up to you. Every pro athlete regardless of the sport always ends up like an OLD MAN by the time they are in their thirties and forties because of pushing themselves and their bodies too much and juicing too much and not allowing proper recovery from injuries and training.
Some people just have to learn the HARDWAY...