29 yrs old
Been working out and eating right for 3 months
Started at 200 and was down to 189 as of two weeks ago.

Then I hurt my lower back and had to stop all exercise other than walking.

For the past two weeks I've been consistently losing weight and am now down to 186.

Although I'm still eating a decent diet, I haven't been perfect and I haven't exercised a lick.

Where did the extra weight go?

1) You ate less then you burned.

2) Your body is catching up. This happens to me. I'll eat below the amount required to maintain. My body won't drop any weight for weeks. Then suddenly I'll see a big move in the scale over a few days.

3) Maybe your maintance level is higher then you though previously.

Could be anything. It could a change in salt intake. Who knows.

Are you sure you didn't lose water weight?

I don't know. I drank a ton of water each day before the injury and a ton of water each day after the injury.

It will be interesting to see if I get good results in the next month or two now that I'm returning.

Although I don't think I would trade the pain of that back spasm for 4 pounds..

Although I'm still eating a decent diet, I haven't been perfect and I haven't exercised a lick.

Where did the extra weight go?

Any change in diet can affect electrolyte levels and ratios and result in water loss of retention.

It's not as simple as how much water and/or salt you consume either. If your potassium levels change, you can also change the amount of water you retain. In addition, if you have been on a low-salt diet, raising salt intake can potentially result in water loss!

2-3lb of water at 190lb BW is not very much and could easily be accounted for by water loss.

Also, if you had been exercising a lot (perhaps over-reaching), it is possible you were not losing fat optimally. Once you stopped, your body has a chance to re-adjust and recover and may in fact start burning a bit more fat to use as energy to recover (assuming you were still eating under maintenance).