If you want weight loss, &quot;HIIT&quot; is of no use to you. The best track sprinters in the world can barely summon the power necessary for toasting a single slice of bread. Very few people have energy reserves &gt;30kJ when doing work above VO2max.<p>Meanwhile, you can just spin at 150W on a cycle trainer and burn &gt;2 MJ (that&#x27;s quite a few slices of toast) for every hour you put in.