Daily weigh ins vs. weekly weigh ins

"Should I weigh in every day or just once a week?" It's a common question. And I'm going to give an answer that is very true, but one I think people don't hear enough:

Scientifically speaking, you should probably weigh yourself every day.

Now, this is a post I've been mulling over this for a while. Erin (who, by the way, has a great blog that I'd encourage you to check out) commented on a post of mine not too long back that "the almighty 'they' discourage weighing in daily." And in terms of the diet world, she's right. Weight Watchers, Spark People, and most other diet plans and diet books say you should only weigh once a week. The typical justifications are that the scale can change greatly from day to day, meaning it's not all that accurate, and that there are emotional downsides with seeing false losses and gains throughout the week. Essentially, conventional wisdom in the diet world says that weighing yourself every day can discourage you and stress you out. But conventional wisdom isn't always right.

Weighting yourself every day is actually a good idea according to science. A 2005 study showed that "Dieters who weighed themselves regularly shed more pounds over a 24-month period than people who didn't regularly weigh themselves. Those who weighed themselves daily lost the most." Another University of Minnesota study "found that those who weighed themselves daily lost an average of 12 pounds over 2 years; weekly scale watchers lost only 6. The once-a-day group also was less likely to regain weight loss." And there are more studies out there with much the same message.

So weighing daily makes you likely to lose more weight and keep it off once it's gone. But what about the emotional damage of daily weigh ins? At least one study in the Journal of Consulting and Clinical Psychology says that's a myth. Here's what they found:

Several recent studies suggest that daily weighing is important for long-term weight control, but concerns have been raised about possible adverse psychological effects.
...
We found no evidence that increases in frequency of weighing or daily weighing per se had any adverse effects in this study population. Rather, increases in self-weighing were associated with increases in dietary restraint (p less than 0.001), decreases in disinhibition (p less than 0.003), and decreases in depressive symptoms (p less than 0.002). Moreover, those who weighed daily at 18 months were less likely to report having = 4 binge episodes per month (p = 0.03). Daily weighing appears to be an important aspect of weight loss maintenance and was not associated with adverse psychological effect.

So there's scientific evidence that weighing daily isn't emotionally damaging. It even seems to decrease depression and binging! And why are we supposed to weigh in weekly, again?

The answer to the question "should I weigh myself every day or once a week?" seems to be every day. Scientifically speaking, if you want to play the probabilities, you should step on your scale every day.

That said, just because something is likely to be right for you doesn't mean something is right for you. If you're not comfortable with daily weigh ins, then you shouldn't weigh in daily. It might be that you get extremely depressed by stepping on the scale, or that you truly can't stand seeing the fluctuations. Maybe for you this journey is more the emotional or even spiritual aspects, and that while you do want to track your weight, you don't care much about the numbers. You need to do what works for you.

My advice:

Seriously consider weighing in every day. It may not work for you, but there's some good evidence that it more likely to work than you might think. But, at the end of the day, trust yourself. If you don't want to do daily weigh ins, don't do daily weigh ins. Stick with weekly, monthly, or whatever else makes you happy. The right answer for you might not be the right answer for everyone else. And with that in mind, next time you hear someone mindlessly parrot the diet industry's standard "you shouldn't weigh yourself more than once a week," let them know that science, at least, says otherwise.

Oh, and to answer the requests from yesterday, I will review the Body Bugg once I get mine. It shipped last night, and should be arriving on the 22nd.