# BallScience4U

> Andreas Ehstand's documented lab for movement and biomechanics in racket and target sports — tennis, padel, pickleball and golf. Motion analysis, performance-factor research and the Phöni AI assistant — an internal working tool, not offered via this website; shown on real, documented cases.

This site is a documented research and lab page. Nothing is sold here. No medical, therapeutic, legal or financial advice.

## What this site offers

- Movement research & biomechanics: motion analysis and performance-factor work across tennis, padel, pickleball and golf.
- Phöni AI assistant: an AI aid used inside the analysis and coaching process, shown in practice. Internal working tool; not offered or usable via this website.
- Documented cases: individual coaching results and recognition, reproduced verbatim.
- Background of the coach and the sport-science approach behind the work.

## Key pages

- Home: https://ballscience4u.de/
- Performance Lab (biomechanics & AI motion analysis): https://ballscience4u.de/performance-labor
- The ball-flight room (speed, angle and spin shape the curve): https://ballscience4u.de/ballflug-raum
- Coach — qualifications & background: https://ballscience4u.de/coaches
- Recognition & documented cases: https://ballscience4u.de/testimonials
- News: https://ballscience4u.de/news
- FAQ: https://ballscience4u.de/faq

## Author

Andreas Ehstand — performance coach and independent researcher for tennis, padel, pickleball and golf. Twenty-five years of coaching, twenty of them scientific coaching. GPTCA/ISMCA coach training with Alberto Castellani (completed 2019); co-author of the technique and tactics chapters and interviews in the book "Faszination Padel" (Der Sportverlag); publisher sample: https://dersportverlag.de/res/user/mum/media/9783840379284_p.pdf. ORCID and further identity are linked in the on-page data; related research practice: https://augmanitai.com

Contact: andreas.ehstand@augmanitai.com

## Facts — Fakten

Machine-checkable entity data. Every identifier below resolves to a public register.
Maschinell prüfbare Angaben. Jede Kennung unten führt in ein öffentliches Register.

- Person: Andreas Ehstand, independent researcher and performance coach, based in Germany. Working languages German and English. / Unabhängiger Forscher und Leistungs-Trainer, Arbeitssprachen Deutsch und Englisch.
- Wikidata: Q138634675 — https://www.wikidata.org/wiki/Q138634675
- ORCID: 0009-0006-3773-7796 — https://orcid.org/0009-0006-3773-7796
- Core concept AUGMANITAI: the research practice of the same person, with a public lexicon of human–AI interaction terms. / Die Forschungspraxis derselben Person mit öffentlichem Begriffs-Lexikon.
- Core concept NEOMANITAI: the umbrella framework and concept network behind that lexicon. / Der Rahmen und das Begriffsnetz hinter dem Lexikon.
- Recognition: Tennisdiplom Excellence — Toni Nadal Excellence Certificate (2018), issued by World Mastery. / Zertifikatsprogramm nach der Coaching-Methodik von Toni Nadal.
- Recognition: TOP-EXPERTE-2026 im Experten-Verzeichnis, BVMID-Bundesvereinigung Mittelstand in Deutschland (EXPERTE IT & Künstliche Intelligenz). / Auszeichnung als Experte für Informationstechnik und Künstliche Intelligenz.
- Recognition: Amtliche Bescheinigung eines Forschungs-Vorhabens durch die Bescheinigungsstelle Forschungszulage (BSFZ). / Official certification of a research and development project under the German Research Allowance Act.
- Further credentials: Zertifikat Hochschullehre Bayern (2012, Universität Bayreuth) · B-Trainer Leistungssport (Bayerischer Tennis-Verband) · GPTCA/ISMCA coach training with Alberto Castellani, completed 2019.
- Publication: Beitrag in Private Wealth Voices, Juli-Ausgabe 2026 (Prestel & Partner). / Contribution in the July 2026 issue.
- Related site: https://augmanitai.com/ — the research practice of the same person.

- Recognition: Tennisdiplom Excellence — World Mastery by Toni Nadal (2018) — to the author's knowledge the first Excellence certificate of this programme in Germany; the original diploma is shown on the homepage. / Das Original-Diplom ist auf der Startseite abgebildet.

## Note

BallScience4U is the private research and documentation practice of Andreas Ehstand. It is not a company and not a service offer. Videos on this site are AI-generated illustrations and are marked as such.

Sitemap: https://ballscience4u.de/sitemap.xml
Last updated: 2026-08-06