Any science behind oversleeping creating all day grogginess?

I had insomnia for decades with lyme, lived on naps and redbull. Or be homeless. Sleeping in then simply meant I had insomnia till 3 or 4, then finally drifted off till 10 or so on days off work.

Fast forward: after lyme treatment / abx/ gut health, I can sleep pertaining to my bodies needs.

Im also not a strict "bed-timer" up at Adam type ect, never will be, in part due to my free spirit and sometimes irregular work load. In addition to full time also have a part time repair/rebuild gig of my own as time allows (enough to turn work away).

A longer or more intense day requires more sleep. I usually sleep in with no alarm clock on Sundays after a long intense Saturday and never know when I will wake. Im sure my body needs this..

***BUT is there any science behind why so much sleep 9-10 hours can make many people feel like a lazy blob the next day??** .....................(worked my arse off Sat and slept in, thus my lazy arse today on the internet).

Not really a lyme question, but something I started wondering about since I can sleep again.

That's a very good question. Most people complain if they sleep too much they feel sluggish.
If we don't sleep enough we feel tired. It's sometimes hard to get it just right.

Well, I still try to pull all nighters to be productive...And I burn the midnight lamp too, I'm a (former high-achiever) and current diligent doer and I think I push myself to stay awake when I should sleep more. Given that sleep is good, and refreshing and crucial for healing and reducing inflammation. I think it is all disrupted by this bug complex. I've read that top athletes (I think it was Lebron James) sleep many luxurious hours and hours, and it is really common for them to sleep more than most people. So chances are you aren't getting enough ZZZ's, I'm pretty sure I don't sleep enough, as I have more work to do than I could possibly do in the next 3 months, even if were awake all 24 hours a day, with no pause for sleep...nevermind sleep apnea, insomnia, HPA axis disruption and the other "joys" (/s) of this disease.