case studies on s'-āmisā samādhi (worldly undistractible mind in samādhi operating in non spiritual applications)

 Samādhi, Jhāna, pīti, sukha works on worldly applications, not just spiritual ones.

You don't have a special nervous system set aside that only kicks in to give you pleasure if you meditate on spiritual topics.

It's the same pleasurable brain chemicals hitting the same nervous system whether you use jhāna to contemplate rise and fall of aggregates, delight in the efficacy of Dhamma,

or the worldly enjoyment of music, sports, dance.

The nature of the topic determines whether the samādhi is sammā (right, in line with 4 noble truths) or not;

but the mental and physical pleasure operate on the same nervous system.

    SN ^36.31 - SN 36.31 Nirāmisa: Non-carnal
        SN ^36.31.1 - (3 types of pīti)
            SN ^36.31.1.1 – (s'-āmisā pīti / carnal rapture = 5kg )
            SN ^36.31.1.2 – (nir-āmisā pīti / non-carnal rapture = first two jhānas)
            SN ^36.31.1.3 - (nir-āmisā nir-āmisatarā pīti / surpassing non-carnal rapture = arahant)
        SN ^36.31.2 - (3 types of sukha)
            SN ^36.31.2.1 – (s'-āmisā sukha / carnal pleasure = 5kg )
            SN ^36.31.2.2 – (nirāmisaṃ sukhaṃ / non-carnal [physical] pleasure = first 3 jhānas)
            SN ^36.31.2.3 – (nir-āmisā nir-āmisatarā sukha / surpassing non-carnal pleasure = arahant)
        SN ^36.31.3 - (3 types of upekkha)
            SN ^36.31.3.1 – (s'-āmisā upekkha / carnal upekkha = equanimous-boredom)
            SN ^36.31.3.2 – (nirāmisaṃ upekkha / non-carnal equanimous-observation = 4th jhāna)
            SN ^36.31.3.3 – (nir-āmisā nir-āmisatarā upekkha / surpassing non-carnal equanimous-observation = arahant)

1) Alysa Liu 2025 world champion figure skating

In this article, I curate the best in depth sources
2025 after 3 year retirement, 19 yr. old Alysa Liu wins gold at world championship
This is what her coach said about her samādhi in the washington post article:
“She’s a beast on the StairMaster,” [Alysa's coach] DiGuglielmo said.
...
Then she went to her first competition in the fall in Budapest and won it.
Then she won another in Zagreb and almost won the U.S. nationals.
The worlds though were different.
Nobody had expectations for winning in Boston.

“Top 10 I would have been happy,” DiGuglielmo said standing late Friday night beneath the arena stands.
“A medal would have been good but first?"

His mouth sat agape at the thought.

Long ago he learned Liu wasn’t like other skaters.
She had a different energy about her.
She never rattled.
She rarely had meltdowns.
She had an innate ability to radiate happiness (s'-āmisā pīti + sukha) while maintaining an icy focus (samādhi, ekagga citta).

He imagines she would be perfect as a surgeon performing a critical surgery.

“Alysa is not the same as the rest of us, we have doubt, she doesn’t have doubt,” he said.
“It just doesn’t occur to her.” (citta-samādhi-...iddhi-pāda)

And watch Alysa's composure, relaxation (passaddhi pacification awakening factor), in this talk show interview at age 14,

and she also describes the samādhi of her mental process while performing on ice, starting about 45 seconds in:

2) Suni Lee - Olympic gold medalist women's gymnastics

I figured out what citta samādhi in 4ip (iddhi-pāda) actually means