I had a great 6 mile run last weekend barefoot the whole way. I felt great! I had no wear spots or blisters, but my feet were a little tender at the end. On Monday I went for a 4 miler, and at mile 3 I had to walk. My feet still had no marks, but they were so tender I could only run when I could find grass the final mile. So this is my question...is this normal? I think my form must be ok if I am not getting wear marks or blisters.
My other question is how much impact should I be putting on my heels. I noticed this even more when my feet were tender, but prior I observed I tended to touch my heels more when I was fatigued.
"Sore" feet. Okay, a few questions:
1. Have you increased your mileage dramatically?
2. Are you running on consecutive days?
3. Have you changed the surface you've been running on?
4. Were your feet dry or immediately out of shoes?
All the above will be a root cause of "sore" feet. I'm assuming you're talking about the bottoms of your feet as well, yes? Since you were referencing wear spots and blisters, this is what I've assumed.
Until you are a very seasoned BF runner (a year or so with 25+ mpw), numbers 1, 2 and 3 will certainly be a factor in the bottoms of your feet being sore. That feeling is normal and should be telling you "enough for a bit". Listen to your body and give your feet a rest day. ESPECIALLY if you're ramping up your miles. That's the beauty of BF running is the signals your body (feet) will throw at you. LISTEN.
For #4 above, soft, "gummy" feet fresh out of shoes and immediately on to a dry "road" surface (asphalt or concrete), in my experience, has previously led to sore feet. Let your feet dry before attacking a dry road surface. Wet feet on wet tarmac doesn't seem to be any problem.
As for your heel touching, I think we as a community, are not consistent with our message. I am a believer that if you aim for your 4th toe to make contact first (it won't, but gets your foot in the right position) and just relax your foot from there, all will be fine. If your heel is hurting, don't let it come down so fast. That's just my opinion, I could be wrong.
Cheers.