Weights?
Not too intense.
(note: I 'know' squats and deadlifts are the big moves,...BUT unfortunately due to back issues I cannot do them. Last time I tried, WITH my PT....compressed 2 discs....so they are out. I do what I can without risking setbacks)
Day 1 - chest (3x7-10 dbell press, 3x7-10 incline smith press, 3x7-10 dbell flys) and shoulders (3x7-10 dbell press, 3x7-10 dbell lat raises, 3-7-10 dbell front raises)
Day 2 - back (3x7-10 lat pulldowns widegrip, 3x7-10 lat pulldowns rev closegrip, 3x7-10 lat rows) and legs ( 3x7-10 extensions, 3x7-dbell squat, 3x7-10 rev curls)
Day 3 - arms (3x7-10 dbell curls, 3x7-10 straightbar curls and 3x7-10 rope pulldowns, 3x7-10 closegrip smith press)
Day 4 - rest (do cardio twice maybe?.....maybe not).....the repeat cycle.
note: 1 minute rest between sets, 2 minute rest between excercises. Slow motion, emphasize negative motion.
The first sentence is a killer. If you're giving mediocre effort, your results will yield equally.
You were doing back squats when this injury happened? But now you are doing db squats correct? That is excellent. Deadlifts, when done properly, are in my opinion the best and most practical exercise. If I could only do 1 exercise for the rest of my life, it would be a deadlift. Plus there is minimal downward force on the spine.
Taking your current split routine into account, this is how I would rearrange your routine to elicit better results. When in a fat loss mode, or almost any mode for that matter, a body part split such as yours is sub optimal. You want to work as much muscle as possible, as often as possible. We dont need to train arms by themselves, its just not going to do much for you.
Day 1,3,5 - chest 3x7-10 dbell press / back (3x7-10 lat pulldowns widegrip, 3x7-10 seated rows / legs 3x7-dbell squat, 3x7-deadlift
Ive never seen a 7 rep scheme either, not saying that is bad or anything, just uncommon. How long do you run for to burn 1000 calories? 5 hours? I just cant see that as accurate for a 40 minute session @ 70% heart rate.
Additionally you mentioned not going "harder" because you didnt want to burn more calories. Rev it up man, burn some more, thats what you're trying to do.