Basically, after rowing about a 3-4k distance the outside of my feet (mostly on the left foot) starts to "burn", I'd describe it as a burning/somewhat bruising sensation and as the distances increase, this becomes more severe and more of a distraction - It's rather annoying tbh and I'd really like to resolve this, it gets to the point after a few more thousand in distance that the pain travels to the soles of my feet and at that point it's the hardest part of the row, enduring that pain. When googling this, most people seem to have issues with the heel of the foot but I'm completely fine in that regard.
I have rather wide feet which look kinda freakish to me (see linked imgur) which cause most shoes to not be suitable and have one foot 1/2 size longer than the other, I've tried a couple of shoes and always buy the size that fits the longest foot, generally the length is not an issue though. So far, the best shoes I've found are the Nike Metcon 5's however I'm having the issue with these also and on my last row I just used some generic training shoe and while the pain wasn't as bad I imagine it is due to the extra padding but my row didn't feel as good as I couldn't put as much force through each push when it got absorbed by the padding so I'd like to avoid using them, as far as the difference in pain goes though I didn't get the burning sensation start until 7k into my most recent row, so quite a difference.
So I guess my question is, what would likely help this? Thicker socks? Removing the in-sole? Larger in-sole? Something else? I'm not sure what to try first but after visiting a few shoe shops and not finding a better fit than the Metcon's I'm kinda stumped
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Aforementioned photo(s) https://imgur.com/a/liYAjx0