What he said -- but start a bit slower than six days a week! Let the body adapt slowly (weeks to months) to a heavy exercise regimen!! You will not feel better

What he said -- but start a bit slower than six days a week! Let the body adapt slowly (weeks to months) to a heavy exercise regimen!! You will not feel better if you hurt a should or knee, which is hard to repair. Edit: My point is not to avoid feeling bad, but to avoid damage which will hinder exercise and/or lower life quality.