I wonder if running 3 km with a moderate degree of intensity twice a week would be enough for cardio? I read on the forum that some form of cardio is required to get the full benefit of the program but I still don't have a clear idea of how much and what kind of cardio is needed?
I don't need cardio to improve my endurance (as I don't practice any sport) or to lose weight. I suppose I need cardio just because I want to follow a comprehensive fitness program that covers all the major aspects of fitness.
Also, is it a good idea to supplement F1 with explosive movements like jumps since none are present in the program itself? Or if I'm just interested in following a fitness program that improves my health and wellbeing then perhaps that might not be necessary?
Thank you in advance for any tips.