Good for you OP on getting your fitness routine started again. I don't know about PF's specific routines, but you mentioned a 30-minute workout that was 80% arms. I wanted to let you know that unless you are going for lengthy, targeted, bodybuilder-type training, then large movements that engage your whole body will give you much better results with a much shorter workout. As one example, biceps curls with dumbbells will exercise your biceps. But a better exercise is pull-ups (assisted if needed) that will exercise your biceps, back muscles, shoulders, abdominals, and dozens of other smaller muscles.
You can get an awesome workout in just 15-20 minutes with a small number of whole-body exercises that hit just about every major muscle in your body. You only need to do about 5 exercises to hit everything. You'll be tired and in excellent shape, you'll get faster and better results, cardio as well, and I think less likely to give up than with routines that are spending a lot of time on small, targeted muscle groups. Some especially good exercises that don't require any specialized equipment (these are just examples, you can find any number you might like):
- Pushups (works your chest, arms, core, etc.). Bench pressing with a barbell will build even more strength
- Pull-ups
- Dead lift (works almost everything, especially legs and back)
- Squats with a barbell, or jump-squats (jump from the squatting position as high as you can, then return slowly to squatting position and repeat)
- Squat down, pick up dumbbells off floor, stand up straight, curl them up to your chest, press them overhead, then go in reverse to put them back down on the floor. Repeat. This works about everything, including deltoids (shoulder muscles) that are otherwise neglected.
- "Burpees" or burpees with a pushup on each rep
- Bent over rowing with dumbbells. Bend your knees, lean forward with your back straight, grab a dumbbell in each hand, and lift the dumbbell to the side of your chest. Lower the dumbbells back down and repeat.
I'll add to the chorus that before too long, you should consider free weights (barbells and dumbbells) for better all-around results over machines.