Hi Paula,
Since this is a group program and not an individualized 1:1 coaching plan, it’s really up to you if you choose to adapt it or change it. It’s a bit tough to say how this would impact you since we aren’t reviewing your data to know where you are at now, what your past training looks like, etc.
If you change up the intensity of a program that is a more focused on base aerobic fitness, it means you are taking away from that focus by adding in other workouts- this isn’t good or bad necessarily, just depends on what your goals are.
Happy training!