Which one of the following fitness trends involves performing a specific exercise at a high intensity for 20 seconds, followed by 10 seconds of rest?

the answer would be Tabata Protocol and here is explanation of what it is

The study used 20 seconds of ultra-intense exercise (at an intensity of about 170% of VO2max) followed by 10 seconds of rest, repeated continuously for 4 minutes (8 cycles). The exercise was performed on a mechanically braked cycle ergometer.

well i’m not to well in health but if the body produces more standard fat then the fat will convert most of it into energy and give all the muscles nutrients (sorry if it was wrong  

true you must have an adult in the car