Welcome to the strange world of weight tracking. I try to weigh myself every day and I'm often baffled by the fluctuations. Sometimes my weight will inexplicably spike or drop several pounds in a day. When my weight spikes, I can usually attribute it to:
- Eating out at restaurants the day before, as many of them use tremendous amounts of salt in their recipes.
- Working out intensely the day before, as your body retains fluids when repairing micro-tears in muscle. Lifting weights is notorious for this.
- Eating lots of salty food such as chips or soups, or eating food like watermelon with lots of water.
- Drinking a lot of beer.
- Not having regular bowel movements.

When my weight drops a lot, it usually seems to be related to:
- Dehydration from exercising or just being outdoors a lot in hot weather and not drinking enough.
- Bowel movements.
- Getting a lot of sleep.