Same with me. Now that I've worked up to the max weight I can do and 3x 12 reps - I ended up pooping out the next session and not getting all 12 in. It must be age, because lifting every other day was perfectly doable in my teens & 20's. I'm going to try lifting every 3rd day -- which would average 2.5 times a week. That should be enough recovery time. I guess we'll see.

I'm into my 2nd month of this routine and I can already feel the benefits. It is definitely firming me up in places that were too soft and flabby not long ago. When I lose some more weight, I may even be able to see the benefits, too.