Slow and steady for a couple miles or something like wind sprints or what not, got 15 pounds to lose in 2.5-3 weeks so considering not eating just for the extra weight lose
this sounds pretty gay, but walking with ski poles on an empty stomach is teh poan for weight loss (nordic walking). you do that for like 2 hours that's the best thing ever for fat loss (besides diet of course). just make sure you don't overdo it so you're straining your tendons in your upper body.