I've got 11 days to lose 3kg, how can i do this? i know this is very extreme but i hv a boxing weigh in 11 days & im 3kg overweight.

Sorry: But without severely and dangerously dehydrating yourself it is very unlikely that you could lost 6.6 pounds in 11 days, and that would be water, not true weight. A pound is 3500 calories to gain or lose, you would have to burn off 2100 calories/day that you don't take in -- or the equivalent of running more than 210 miles/day. I doubt you would be able to perform at your boxing event even if you.