During my hour rest run today I ran 6 or 7 cadence drills. They really are a low-level form of intervals. Instead of measuring the intervals by meters, yards, city blocks, you measure the intervals by # steps in 30 seconds. Jeff Galloway suggests that the second interval be 1 or 2 steps faster than the first interval, and that is what I did. I ran my rest pace for recovery between the drills. When I started the run, I ran my rest pace for the first mile to warm up, and then I ran the cadence drills for the next mile and a quarter to my turn-around point. I didn't run any on the way back since this run was a rest run.