Subjects and Study Design
The sprinting groups showed significantly reduced appetite immediately following the sprint protocol in addition to 30 minutes post exercise. While there was a trend for reductions in appetite at the 60 hour mark, the difference was not statistically significant.
Additionally, the sprinting group observed significantly less ghrelin and a slight increase in the homrone GLP-1 or Glucagon-Like Peptide 1, a hormone associated with blood glucose control.
Despite these favorable changes, actual food intake of the subjects was unchanged and did not differ from the resting group. While that may seem like it was ineffective, I wouldn't be so quick to conclude that.
Realistically, this is a big deal because it means that you can use sprints, according to your own ability and likely see a reduction in appetite and appetite promoting hormones.
How to use this information
Despite the fact that the study showed no reduction in food intake, this is likely due to having too long of a resting period in between the sprints and food intake.
Rather than waiting so long, I recommend you complete a couple sets of high intensity sprints (relative to your ability, just work really hard for a short amount of time) within an hour of your planned meal.
It's highly likely that if you do the sprints within an hour of the meal, you'll have a reduction in appetite, ghrelin and thus will consume less food, even if presented with an unlimited supply.
Just keep in mind, you'll want to make sure you don't work too hard. If you do, you may not be able to consume food. Not because your appetite is suppressed, but rather because you are sick.
Why this should matter to you
It should matter because this study revealed that very low volume sprints, completed relative to your own ability (not wingates) is able to affect ghrelin secretion, the hunger hormone, and thus reduce appetite.
If you are on a diet or just hoping to consume a little less food, you can use a couple sprints prior to a meal and expect that if you eat within an hour or so, you'll probably consume less food.