Purchasing a couple of anti-fatigue mats are certainly in order especially where you do most of your standing/prep. I don't allow tennies in the kitchen, not only are most not slip resistant but there is just not the support you need for standing.
I don't encourage professional shoes at home because they seem to take to long to break in. I always make an annual trip to a good shoe store and inquire what the surgeons are wearing. In my neck of the woods they are still wearing a pro style Rockport which is what I wear in my home kitchen. See the site
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