What is "screwing your shoes"?

It’s inserting short, hex head screws into the lugs in the outsole (ie, the bottom) of the shoe For an excellent write up on how to do this, read Matt Carpenter's webpage, "The Screwed Shoe".

Shoreline Shuffle 5K Trail 2009

Sanders' Saunter 10K Trail Run, Sat. Nov. 19, 2011, North Shore Trails, Clinton Lake. Brad Trimble photo

RRCA Coaching Certification Class, Lawrence