I started a workout program already in December. Most days I lift dumbbells and (try to) train for upper body strength, and every once and a while I devote a day to moderate cardio instead. A few things are obvious to me:
1) exercise on its own can definitely induce POIS-symptoms;
2) often, if I have POIS symptoms but manage somehow to start exercising (even though my body tells me not to), the symptoms alleviate and I feel better for the rest of the day (often at the expense of waking up with brain fog the next day, unfortunately);
3) sometimes, the day after a workout (or after O), I just can't lift a single dumbbell. In days like that, I skip the exercise.
The above 3 points have already appeared elsewhere in this forum. What's more interesting is that I can add something on the bright side
4) A POIS cycle seems to not kill my gains. Let's say I start an exercise, and I initially do maybe 3 series of 8 reps, with 8 reps being my failure on the third series - that is, no way I can do a 9th rep. Then I train for several days. Especially when out of POIS, I feel great. Let's say after a week or so, I reach 9+9+10 (last 10 on the last series being again up to failure). Then let's say POIS kicks in. But then after it's gone, when I feel fine again and try, I can again do 9+9+10. I regard this as a piece of good news.
I keep a detailed log of how much I've lifted each day and when I've had an orgasm. One of the reasons I launched this program is to gather further data on POIS and exercise. I'll keep observing, but it's all a mystery to me, to be honest.