Concentrate on your weight training on those days and go for fartlek training on wednesdays and saturdays, not in the gym, on the road (or off the road which is better for your legs). I do a lot of my cardio this way, 3 times a week (one of them is my 5km race on saturdays so i count it as a very fast session). I start with 5 min slow jogging, and the i gradually increase and keep my HR between 175-185 bpm for 20 min, then 10 min slow jogging at 150 bpm, then 10 min 175-185 again, and 10 min back to slow jogging again before i stop and stretch (i always stretch at the end, not at the beginning). It's very demanding, i can assure you! Leave Sunday for rest and church
I wish I could, I just don't have the time to commit to that
I basically work mon thru ftri 8am to midnight, then sau 9am to 7pm, and Im beat after that!