If your mood swings with the scale, it’s hurting you. Weight fluctuates 2-5 pounds daily due to water, sodium, hormones, and digestion — none of which reflect actual fat loss or gain. A review of twenty studies found the psychological associations of self-weighing more often negative than positive, turning on who is weighing rather than how detached they feel; daily weighers in a separate trial nonetheless lost more weight, and which way the causation runs is unresolved — better mood among adults already in treatment, higher depressive symptoms among women in the general population, more body-checking among people with eating disorders. If you can’t see a higher number without feeling defeated, you’ve given the scale power it shouldn’t have.
This companion covers why weight fluctuates, when daily weighing helps versus hurts, the mood connection problem, alternatives to daily weighing, and the deeper question of why the number affects you. (5 min read)
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