Hello Anthony,
It's very possible that is the case, doing too much or too litte, it is also possible you are becoming more aware of the rhythms your body has always had. Or you could be doing the right mixture of action and non action and are experiencing the natural result of your practice or method. Probably a combination of the above.
The mind does the same thing with relationships. You get into a relationship and it affects your chemistry, the new stimulus expresses parts of you that were dormant or repressed. This new relationship with love my trigger your hang ups, or amplify your liked qualities. It is hard to attribute.
Naturally, if you are unsure you don't want to push things. Just see how it goes with careful observation. You may find out over time that adding a practice or dropping one is the right call. There's no way to know, but intuition has a wonderful record of coming close.
In most cases, but especially one that is in the grey area, you are the best one to decide. You are the one in meditation, only you know where you might be pushing too hard or not enough. You might just be clearly experiencing the low energy state, which becomes more noticeable as our body becomes accustomed to living in ecstatic inner stillness.
I've become very watchful of my mind and recognize fairly well now when I have low energy. I use my mind less and depend more on my routine, as my mind is unable to function as I like. At this point for me, it is best used a vehicle to carry out the daily schedule. When the cycle changes and my energy returns, I feel stronger than before and ready to yoga. Somedays I begin in a tired state and push through, other times I am carried through on a tidal wave of bhakti.
If you are doing any asanas, exorcise, or just went on a really great hike, your body could be broken down and on the mend. Since I have begun stretching heavily and exploring more asana routines, I have a bit more down time than before. But it is understood and easily managed/balanced.
