5K pace, in sessions like these:15 x 400m at 5K pace, with a recovery time of 60 seconds.5 x (800m with 2 minutes rest, then 400m with 1 minute rest) at 5K pace.6-8 x 1000m at your 10K pace, with 2-minute recoveries.4-6 x 1 mile at your 10K pace
