In an interview on the tonight show Arnold Scharzenegger was asked how many days a week he trained, and his answer was 6 times/week, but on a post someone said he only trained 2 days/week.
I've heard people say to only train a muscle group once per week, yet none of them have shown test results, or specific data to back this up. It seems people are reading what someone else wrote, and passing it along to the next guy, without knowing for sure if its the truth! Also, age is important, yet most people don't include their age.
There is talk about muscle breakdown, and overtraining, but I've still not seen the evidence to support these ideas. What would be wrong with training a muscle to failure 3 times/week instead of one? Wouldn't this yield faster results? What about 5 times/week? How do we truly know what is too much? I'm still not convinced one way or the other on this most important topic, and I welcome any and all suggestions.