Every 5 minutes, for 15 minutes (3 sets) for times of:
30/20 Calories of Assault Bike
30 Kettlebell Swings
Rest 3 minutes
OR                                                                                                                                                                                                                                                                                                                                                                                                     Five sets of:
Row 350 Meters
10 Burpees over the Erg
Rest 90 seconds

Try to make your sets as consistent as possible.