- The article talks about HIIT which is a more general principle and not just a name for this specific exercise. It has been shown to be in some regards better than longer endurance exercises. And yes, with scientific studies with a HIIT group and a control group. The specific exercises that I have seen have been more about running or cycling than body weight exercises for that matter.
- This post was clearly aimed at people that want overall health and not necessarily more explosive strength, yet you only complain about the strength-part.
- EVEN disregarding the last point: you can gain a lot of strength from just body exercises and some props like a bar; all I have to say is gymnasts. I guess you can't accuse that sport of being a recent fad. Whether or not barbells and dumbbells are better comes down to the specifics of explosive versus endurance, strength vs bulk and so on and so on.