20 minute myth and 4 minute miracle

One of the silliest CARDIO MYTHS that you hear in the gym is this: "You have to exercise for 20 minutes before you burn fat." That's ridiculous. It makes no sense. You are burning fat every single minute of every single day. Sometimes you are burning more fat than other times - like in the Afterburn period of today's 4-minute workout - but you are never not burning fat. Of course, there