I agree Justine, 30 minutes of cardio a week is a big difference from doing hour+ long sessions of cardio several times a week. However, it think the article makes an excellent point--balance. I personally need more cardio than 30 minutes once a week for many reasons. Mental/emotional health, striking that balance between strength, cardio and flexibility and finally--cardiovascular health! I fear if I were to follow Body Beast as laid out, I would lose heart and lung strength! But that doesn’t mean I feel compelled to do hour long sessions of cardio. Adding a few more short HIIT level cardio sessions serves my purposes fine and seems to fall in line with the article as well.
My biggest weakness has always been the flexibility aspect, but I really feel like since I have been doing Body Beast I have struck the best balance I've had in a while. My cardio sessions are short but intense and I do 3-5 a week. I strength train almost every day but shorter workouts and I do flexibility multiple times a week. I actually feel pretty good!
On a different note, my husband started the Bulk phase yesterday (I start next week) and I am previewing as he does them. Now, I have only previewed one Bulk workout so far (Chest), but after watching that one, I think that maybe due to the title of the workouts and phase "Bulk"--I was assuming this program was structured similarly to STS Hypertrophy (Build) and Strength (Bulk). I don't think that's the case anymore. I think the entire Body Beast program is primarily hypertophy. Bulk just focuses on the individual muscle groups even more intensely with new/different techniques than Build uses. I'm okay with that, btw. But I guess I won't worry so much about going crazy heavy anymore because it doesn't seem that Bulk is designed to be "strength" focused anyway. Again, this is just from me previewing one workout. My opinion my change by the end of the week!