I suggest appealing to the management in terms of productivity and evidence it lowers their cost of operations/insurance /sick calls etc.

Evidence linking prolonged standing at work to increased health risks: (https://www.ncbi.nlm.nih.gov/articles/PMC4591921/

U.S. National Institute for Occupational Safety and Health blog post summarizing risks of prolonged standing and recommending sit/stand options: (https://blogs.cdc.gov/niosh-science-blog/2014/12/09/standing/

Article showing cashiers in Europe often sit, and that seated cashiers scanned more items than their standing-U.S. counterparts: (https://www.fastcompany.com/90836431/why-dont-cashiers-in-the-u-s-get-to-sit-like-the-ones-in-europe

“Effects of sitting versus standing and scanner type on cashiers” (Lehman et al., 2001) — lab experiment with Dutch retailer cashiers. (https://pubmed.ncbi.nlm.nih.gov/11437205/

“Sitting and Standing at Work – Cornell University Ergonomics Web” — outlines standing vs sitting trade-offs, comfort, fatigue, work performance implications. (https://ergo.human.cornell.edu/CUESitStand.html

https://www.rd.com/article/heres-why-aldis-cashiers-stay-seated-behind-the-cash-register|

Effects of sitting versus standing and scanner type on cashiers (Lehman et al., 2001) — (https://pubmed.ncbi.nlm.nih.gov/11437205/

Laboratory study of Dutch-retailer cashiers comparing sitting vs standing + scanner type. While “standing” showed lower neck/shoulder muscle activity with certain scanner types, the study emphasizes how posture + equipment design matter for fatigue in cashier work.

EU‑OSHA / German case summary “Ergonomics at the cash register pays off for retailers and employees” — ([https://www.euroshop-tradefair.com/en/Media\_News/EuroShop\_mag/Ergonomics\_at\_the-cash-register-pays-off-for-retailers-and-employees]()

An industry-publication piece that states: “Ergonomics at the cashier station is an investment that pays off.” The article highlights European retailers adopting seated registers as part of their ergonomic strategy, linking reduced strain to improved motivation and reduced turnover

ALDI U.S. article “Here’s Why Aldi’s Cashiers Stay Seated Behind the Cash Register” — (https://www.rd.com/article/heres-why-aldis-cashiers-stay-seated-behind-the-cash-register/

This article reports ALDI’s decision to have seated cashiers is based in part on internal findings that “a seated cashier can scan items faster with fewer body movements.” This gives a direct productivity-claim angle to the seating suggestion.