Should the older man confine the wearing of white trainers to the gym, tennis court or sports field? I think so and present these photos from The Sartorialist in evidence. (This is a very personal view; of course you can wear what you like!) I've admired the style of this gentleman, as shown in the lower picture, in a previous post. I'd be happy to look this stylish in middle age. However, I'm not convinced by the white sports shoes in the first picture. I love the white chinos, shirt and…