I have no desire to be the next Arnie, only to get into better shape and rebuild some of the muscle I lost along with the weight. And maybe fill a little of my newly sagging skin with muscle, but i don't expect a lot of that to happen.
Any comments or suggestions are welcome.
I should probably give you a little background so you know I have some legitimate basis for making my comments. From about 15 years ago to 12 years ago I was working as a personal trainer, with the appropriate qualifications (Cert IV. in Australia). I'm no longer doing it for a number of reasons, but primarily because running your own business isn't really compatible with depression. Anyway, I do have a background in the fitness industry, but my qualifications are out of date.
Anyway, on to the comments.
Too much volume: too many exercises, and too many sets. If you were aiming to be the next Arnold, or the next Ronnie Coleman, this sort of training might be appropriate. But for your stated aims, there are better ways to do it, involving fewer, more effective exercises.
Too many pushing exercises and too few pulling exercises, while will lead to a muscle imbalance.
So lets look at the exercises you're doing, which I'll try to group into categories.
Legs
You did five leg exercises on Monday, and seven on Tuesday:
- leg extension (twice): isolation exercise† for quads; can be really hard on the knees.
- glute kick back (twice): isolation exercise for glutes.
- calf press: isolation exercise for calves.
- leg curl (twice) isolation exercise for hamstrings.
- hip abduction (twice): isolation exercise for abductors
- leg press: compound exercise‡ for quads, glutes, and hamstrings; calves as auxiliary.
- split squat: compound exercise for quads, glutes, and hamstrings; calves and core as auxiliary.
- landmine RDL: compound exercise for glutes and hamstrings; core as auxiliary; this dead lift variant may put shearing forces on the lower spine.
If you look at that list, the last three exercises each work a large list of muscles, while the first five only cover a single muscle group. The only one of these that covers a muscle group not covered by the compound exercises is the hip abduction, and unless you're involved in activities where that muscle is used (breast stroke swimmers, football [soccer] players, football [rugby league, rugby union, and grid iron] goal kickers [but only "round the corner" style kickers, horse riders and maybe gymnasts are the only ones that come to mind), I would question the functional value of training that set of muscles.
† isolation exercise: an exercise involving movement at a single joint that works a single muscle or related group of muscles, e.g. the bicep curl, where only the elbow moves and which works only the biceps.
‡ compound exercises: an exercise involving movement at multiple joints, which works a chain of muscle groups, e.g., the lateral pull down involves shoulder and elbow movement and works the lats (shoulder) and biceps (elbow).
It's gone pumpkin time in my part of the world, so I'll have to continue this tomorrow.