The ultimate solution is just to live with it. The little shards are occasionally sticking up at just the right angle to force a minor puncture. It's about the same as stepping on rose or blackberry thorns or on the thin point of a broken mussel shell on the beach. The pain is not severe, more of a sharp twinge. Sometimes it gets stuck and you have to pull it out. It bleeds somewhat, which is a good thing.
Once the foot soles are thickened from use, it really takes a lot to force a puncture and your reflexes evolve toward letting off pressure from the ground as soon as something sharp is felt. A resulting wound is usually thin and tiny, and seals/heals pretty quickly.
I had a glass puncture wound while running just a few weeks ago, but the one before that was sometime last year. This is on asphalt city walkways/bikeways that are very heavily frequented by the public throughout the week. So, I feel like it's pretty rare, even there. Maybe once every 200 to 300 miles of running on city sidewalks or trails.
Once the foot soles are thickened from use, it really takes a lot to force a puncture and your reflexes evolve toward letting off pressure from the ground as soon as something sharp is felt. A resulting wound is usually thin and tiny, and seals/heals pretty quickly.
I had a glass puncture wound while running just a few weeks ago, but the one before that was sometime last year. This is on asphalt city walkways/bikeways that are very heavily frequented by the public throughout the week. So, I feel like it's pretty rare, even there. Maybe once every 200 to 300 miles of running on city sidewalks or trails.