Just curious as to everyone's thoughts on training body parts once per week vs. twice per week...or thrice or whatever your fancy is. These forums seem to be a lot more science based than most, so I'd like to hear the reasoning behind why too. I've been training everything once a week for years and have made drastic improvements, but in my quest I'm always searching for what is most efficient. Recently started trying to do everything twice in an 8-day cycle, which raises another question. If a week were 8 (or 6 or 9 or 23) days long instead of 7, would your split be different?
Other than work schedules and just the sheer time requirements, what's the science for recovery times and protein synthesis? I've been reading that it falls off drastically after 48-72 hours, so training everything once a week is losing out on 3-4 days of potential growth. Is it all genetics and diet and rest based, or what else is involved? I haven't been doing the new 8-day cycle long enough to determine results yet so I'm not sure if I like it or not...seems to take longer in the gym though, and since duration and intensity are inverse correlations, it would seem it's a negative thing though. Your thoughts?