I can't even explain the crushing artificial fatigue that benzo withdrawal caused. It started during tolerance withdrawal in January 2012 and still have it now at almost 6 months off. I'll get those days where I feel pretty normal and ready to do things but it is only a few hours per month. Very back and forth but 90% of the time the fatigue is insane. I had blood test, thyroid, stress test, etc.... no issues at all. I'm 31 and was a weight lifter for 10 years , haven't been in the gym for almost a year now.