Hi. I recently ran the 10km Yorkshire Run. I completed it in 38 minutes. Which is like 6.3 minutes a mile. I run 3 times a week due to being a competing boxer, but only ever run 3/4 miles each time. How would I go about getting below the 6 min a mile mark, as I can't seem to break this barrier. Should I run for longer periods or shorter periods but at a faster pace?