I was just wondering whether you guys are using your VFFs for indoorsports as well. I've got the Flow/Trek Model and I thought, the more often I'd wear them, the better for my feet. So I've been using those a few times for indoor tennis (on a hard gym floor) and I don't know whether this is really related to the VFFs, but since a few days, I've been feeling pain in my knees (first the right one, now the left one) and now I'm wondering whether this might have been caused by wearing the VFF indoors.
I should add, that I haven't worn them that much yet and mostlyindoors, because I simply didn't have the time yet to try them out. Now I'm wondering whether I simply might have overdone it a bit and simply should start out a little slower and in an outdoor environment to get my feet "adjusted" to the VFFs or whether it's genereally a bad idea to wear VFF for an indoor sport like tennis that really does put quite a strain on the knees/legs.
Anyone got any expericences to share or advises for me?