Fitness: Is the 7-Minute Workout too good to be true?

It’s no wonder the 7-Minute Workout took the world by storm when it debuted in 2013, promising a full-body workout in just a few minutes a day.
One of the first workouts to demonstrate the power of high-intensity interval training (HIIT) to the general public, it consists of 12 body weight exercises (squats, two variations of pushups, jumping jacks, lunges, dips, step-ups, wall sits, crunches, two variations of planks, running on the spot) performed in 30-second bursts with a 10-second res