Hmm I did it for long time I use to do really heavy work out once a weak and after 72 a relative light workout. I thought I was maintaining the shape.
But it was making me so lethargic it was like a step short from intoxicating my self with work out. Next day from heavy work out I used to be dead slow. Not able think as sharp as I normally do. etc etc.
Then I got some equipment at home and I reduce intensity plus I made work out more frequent.
Now i lift weight 4 times a week and run 5 times a week. Like I said I did step back to make it less intense at first but now I am lifting more weight and running more too. plus I am more relaxed during the day.
So try doing it. make it more frequent like at least 4 time at max 5-6 times a week.
If any analogy.. I can think of 2 levels. one which make us keep the minimum shape to perform work out.
Two which make us relax and enable to do things in best possible manner.
So to me you are getting to level one. once you work out more often you will be on leel two. Hece more less issues.