Consider the source. Periodicals are in the business of selling you content (and advertising). Therefore, it is in their interests to create the latest "fad"

Consider the source. Periodicals are in the business of selling you content (and advertising). Therefore, it is in their interests to create the latest "fad" and to sell it to you as tested. And then create something new and sell it to you again. And then... Is this workout terrible? No. It beats nothing. Is it the key to your ongoing physical fitness? Of course not. The fitness world is overrun with so-called experts. One problem is that we are all different. We have different body types, different goals, different strengths, different weaknesses, and different likes/dislikes. What works for me may not work for you. Can a periodical take this into account for all readers? Of course not. Consider their workout as a first step. If you are doing nothing, do the 7-minute workout. It will help you, to a point. Thereafter, you'll need to challenge your body to do harder things. Also, consider the physics definition of mechanical work: W=f*d. So, go apply some force of a distance. That's a workout. Do work.