The only exception to the rule is for people that have had the workout bug and work ethic in the past. For instance, I used to workout for like 5 years, then got busy with work, was traveling a lot, eating out all the time because I was on the road, and didn't really have tie to workout for close to 3 years. Now, just this year I decided to get back into it, and went full throttle right away and have had great success. If I never worked out before, I would've hit a wall a while back and ended up quitting.