I've seen some users post about training the same bodypart twice per day to increase the intensity a bit. I also read somewhere a while back about some lifters in the Eastern Bloc who would always train twice per day.
What I haven't read about are the detriments. Does anyone know about the downsides to doing this? I'm going to begin training twice a day for chest, back and legs since they're big groups with a lot of muscle/different functions. My rest days will still stay rest days, and the gear I'm running should keep me from overtraining, I'd just like to hear how it has worked for others.
Workout 1 - Pressing movements
Workout 2 - Squeeze/Fly type movements
Workout 1 - Thickness
Workout 2 - Width
Workout 1 - Size
Workout 2 - Separation