me and my wife are going to start this in the morning. Once I get about 2 weeks in I'll probably bump from 1 set to a second. I would like to eventually get u

me and my wife are going to start this in the morning. Once I get about 2 weeks in I'll probably bump from 1 set to a second. I would like to eventually get up to 3 sets... I have a feeling that is where the sweet spot might be... a 21 minute intense workout.