Supposedly. My schedule has been so screwed lately that I can rarely get to the gym let alone get in my cardio. Yeah, he calls it "energy systems work," but just because you call a dog's ass a work of art, doesn't make it beautiful.
In other words, I really don't like the "energy systems work." That said, my fat ass needs to do more.
Really, Phase II is such a killer that I really can't see anyone having the energy to do 20-25 min. of "ESW" doing 2 min. easy/1 min. full bore. If I have the time to get in the gym, I usually do the cardio then fool around in the weight room with swings, walks (farmer's, waiter's), DB snatches, partials, anything to throw weight around and cause the gym patrons to panic.