How is it that I can be at a certain weight one day and weigh 8 pounds more 2 days later? I eat the same day after day and go to the gym 5 days a week.

ask our dietitian your question today Frustrated with weight fluctuationquestion-answer-color-v-2

How is it that I can be at a certain weight one day and weigh 8 pounds more 2 days later?  I eat the same day after day and go to the gym 5 days a week. – Paul



Most likely, the variation you observe is due to fluid shifts otherwise known as “water weight.” This normal fluctuation happens to everybody. Fluid shifts are not only due to liquid and electrolyte intake (which you say is stable), but also perspiration, constipation, urination, temperature and regulatory hormones which are not under your control.

You shouldn’t be concerned with fluid retention or loss within normal parameters.  Swings in weight for people with larger bodies can seem extreme. An 8-pound fluctuation for a 200-pound individual is just 4%, the same as a 4-pound fluctuation for a 100-pound person. If you observe puffiness in your face or extremities that doesn’t resolve in a couple days, contact your physician.

You want to track your weight over a period of several weeks to determine its trend. Make sure that you are weighing yourself at the same time of day, in the same type of clothing and on the same scale. A reliable place and time is at home in the morning after using the toilet, but before breakfast or exercise.

– Debbie J., MS, RD

This article should not replace any exercise program or restrictions, any dietary supplements or restrictions, or any other medical recommendations from your primary care physician. Before starting any exercise program or diet, make sure it is approved by your primary care physician.

Do you have a question about your diet or nutrition? Ask our dietitian by submitting your question to or simply ask it in the COMMENTS section below.

To learn how to follow the “Ask Our Dietitian” Q&A CLICK HERE!

Debbie James is a registered dietitian. Any views or opinions presented in this article are solely those of the author and do not necessarily represent the opinions or recommendations of Fitness International, LLC.

Posted on July 29, 2015, in Ask Our Dietitian, Health, Helpful, LA Fitness Blog - Living Healthy, Nutrition, Weight Loss and tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , . Bookmark the permalink. Leave a comment.

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