I just lost 5 lbs overnight??!

I just lost 5 lbs overnight??

Before I went to bed last night I checked my weight, I was 88. So I did some pushups, v crunches, and crunches and went to bed, I woke up and biiked for about 30 mins. Im 83 now. WHAT HAPPENED? I wanted to lose weight, but I didnt expect for it overnight!How did this happen?

1 week ago
Im only 4 foot 9. :(

1 week ago
ARGH IM BACK To 88 :(

I hope that's not pounds, because if it is and you're a full-grown adult, you're in serious danger of death. If you're not a full-grown adult, stop messing with your body unless you want to stunt your growth and be 5'3" your whole life. You're probably dehydrated, there's no food in your stomach, and your bladder is empty. I generally weigh about 3 pounds less in the morning than I do at night.