Just found this great info about why the band gets tight during stress and at different times of the day. I actually believe the guy. Click here to read the original blog post by Dr. Terry Simpson, MD (Lapband surgeon from Arizona). BTW, he has a lot of other blog posts well worth reading.
Here is his post. the part in red about the balloon in the band being semi-permeable might explain why I have problems when I fly.
“Often times patients will come in because their band feels too tight. They find more difficulty with some foods, and are uncomfortable. They ask me “does stress cause the band to tighten?” The answer is, yes, it does.
If a patient has 5.5 cc in their band (we measure it) and they come in and it feels tighter, we find they have 6 cc in the band. Where did the ½ cc come from? That is from the extra water the body is carrying. Since the balloon on the band is semi-permeable it will retain more water also.
This is the same reason that most people find the band to be tighter in the morning. In the evening you may notice you have some swelling of your ankles – by gravity your body water has gone down to the legs. In the morning that swelling is gone, and the water has gone back to the central compartment of the body where the band is. If we measure the band in the morning it can have 0.25 to 0.5 cc more in it (which can make a difference).
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