The exquisite teamwork of a Japanese ramen shop couple

A famous couple's ramen shop that has been introduced many times on TV! This couple can use the most skilled cooperation and "graceful" movements to quickly make 6-9 bowls of ramen at the same time. Although it looks a bit distressing, I still admire such a work ethic. I wonder what kind of occupational diseases would be developed from working like this for a long time.