Get fit with a 4 minute workout

I find this article a bit misleading.

Link:http://abc13.com/hobbies/get-fit-with-a-4-minute-workout/270578/

For instance:

"In the original study by Dr. Tabata, one group did 30-minute workouts four days a week, while the other group only did the four-minute Tabata workout four days a week," --> We know it was 1 hour for 5 days at 70% of VO2 max for the cardio group, VS 4 Tabata sessions plus 1h cardio for the Tabata group.

"Tabata training also works with low impact exercises such as biking, squats, or push ups." --> not really for push-ups... you can incorporate such exercises from time to time but you will never get the same intensity (170% Vo2 max).

"Experts suggest easing into the workout because it can be taxing on the body. Try doing 30 seconds of intense exercise then taking a 30 second break for a few rounds before working your way up to the full four minute workout." --> 30 seconds will be harder than 20s if you target the same intensity as Tabata. A progressive training must include HIIT with a ratio 1:3 for instance (3 times the duration for rest, for instance 20/60, 30/90, 1mn/3mn and then reduce to 1:2, then 1:1 like the classical 30s/30s in running, and finally move your way to 2:1 like Tabata).