Full session - 5 minutes warm up followed by speed work - 5min (2:30 min recovery) 4 min (2:00 min recovery) 3 min ( 1:30 recovery) 2 min (1 min recovery) 1 min. 5 min cool down. This session should be ran at or near your 5k pace. Example if you run a 5k in 25 minutes you divide 25%5=5min /km to get your pace per km.