Everyone is correct. All interval people are "always fit" trainers. LSD people are periodizers.

People at work I know have hired personal trainers but there is no chance I should train like them. We both may be average joes but we have different goals.

Ok Galen was wrong in my opinion; while working a full time job you can still put in 600 hour years (2 hours 6 days/week 51 weeks/year) and have a recovery day and vacation. I think most of us have had an overuse injury before. ;/