To me, over training simply means under recovering. At 30 years old I was able to work 50-60 hours a week landscaping, lift 4 days a week, and still throw 5 days a week and kept it up for months on end without any lay off or "deload". That stint when from June til October, and I was able to peek properly for my world championship even though my job created non optimal circumstances. I just made sure I covered all my bases with Supplements, slept a solid 7-8 hours each night, and made sure my calorie intake stayed at maintenance or better(except for a month when I dropped 10lbs for nationals). It was definitely hard at first, but my body adapted and I made it work. I could have easily fallen to the wolves if I had pressed it too hard, ate poorly, cut into my sleep to have more "fun" time, but I didnt. I made it my priority to keep my body recovering optimally so I didnt have to compromise my whole season simply because I had to work too much. Cheers!