high intensity...try that 75mg ED. also if you are really into high intensity workouts,6 days a week may be overtraining you. maybe, take 3-4 days off then work out a day and take a day off,etc. you can overtrain even while on.
when i was in my 20's i was 210 and 5-6% all year round....couldn't figure out why i wasn't gaining muscle. when i got to my early thirties (after 16 years of training) my body hurt from 6 days a week,so i went to the above protocol. now, i'm 39 and 260, i calipered last nite at 8%