A. Aerobic Threshold Intervals Workout

On the 0: 30/25 Calorie Row
On the 3: 25/20 Calorie Row
On the 5: 20/15 Calorie Row

On the 7: 30/25 Calorie Row
On the 10: 25/20 Calorie Row
On the 12: 20/15 Calorie Row

On the 14: 30/25 Calorie Row
On the 17: 25/20 Calorie Row
On the 19: 20/15 Calorie Row