Running & rowing Workout

8min Run / 2min Row
6min Run / 4min Row
5min Run / 5min Row
4min Run / 6min Row
2min Run / 8min Row

Run hard, but try to keep the same pace in all sets. Use skillmill if possible.
Rowing is for active recovery. Keep moving all the time, but take it easy. You can adjust the damper as you wish.