I have lost a lot of weight lately bc I have been dieting and doing lots of cardio and i have noticed that when I do am cardio on an empty stomach, it takes a lot longer for me to get to my target heart rate (70%) than it used to. SHould I up the intensity at the beginning to reach my THR faster, like maybe jog at the beginning and then slow it down to my normal incline walk?? Or does it matter?