I vary my training methods so as to not get stagnate, but right now I am training 6 days per week. Somewhat higher volume and based on many of the MD principles I've gathered from John's website, postings, and videos... I hit thr areas that need more emphasis more frequently and try to get some carry over in my back and chest workouts for bis and tris, respectively.
4 days per week here. Focus on intensity and also use some MD training. Fasted cardio 7 days/week @ 45 minutes and on those days off I will usually throw in some ab work..and extra calf work. Works well for me...but I'm older @ 48.
Generally 5 days a week but occasionally only 4. I have found that my joints need the days off to recuperate or I'll develop nagging injuries. I would train 7 days a week if I could.