I have found over the years that my body builds and retains mass better working 1 body part per day spread over 5 days. I typically do that MON-FRI with weekends off from the gym. I may still do some bicycle riding but no weights.
But, the times that I have been on a run, I get antsy on the weekends and want to train 7 days a week for that 6 week run. I want to get every last benefit from my supplements. I actually feel guilty for spending the money and not training on SAT and SUN during a run. But, I remind myself to not overtrain.
Does anyone else go thru this dilemma?