Got up early to run the workout today before temperatures began to climb and felt great! One question: could you explain the purpose of strides at the end of the workout - are they solely to make you feel fast? (If yes, it worked :)) I ran my strides barefoot and have been experimenting lately with some barefoot runs up to 3 miles - I find that my legs feel looser if I do a few easy miles without shoes on at the end of a run or on an easy day. Thoughts on barefoot running?