Why would you need to stand for that amount of time? Did you ask? Who is it benefitting? Customers? How?
Exactly! Clearly, any employer who believes staff should be required to stand for hours at a time with no option to sit and rest their legs, and doing it for days at a time, is living in the dark ages.
They must be thinking that staff are just servants standing to attention for customers.
Unbelievable! These employers are inhumane and don't deserve staff loyalty. It shouldn't be a race to the bottom, willing to be treated appallingly for no reason.
I've been with the same hairdresser for years, and I support her, I see how well she treats her staff - they have been with her for years, many having started as apprentices, because she treats everyone, staff and customer with the same respect. Her (high) reception desk has no stool, but the staff are never expected to stand there for hours, they have a comfortable seating area at the back and have regular breaks. If the phone rings they work in rotation, either attending to their customer or having a break or answering the phone. No way do I want to see a poor stylist getting varicose veins on my account!
It is possible, so find a good employer with good health and safety regs, don't be prepared to be treated badly.