Your Withings scale provides more than just your weight. It also estimates your body composition, including body fat percentage and muscle mass. While these measurements are estimates, they can be a valuable tool for tracking progress over time.
What do the numbers on my scale mean?
Body fat percentage is the proportion of your body weight that comes from fat, while body fat (lb) is the estimated total weight of fat in your body. Your scale estimates your muscle mass using a small electrical signal. Because hydration affects how that signal travels through your body, your muscle measurement may vary from day to day.
Looking at these measurements together gives you a better picture than weight alone. They can help you understand whether changes on the scale are coming from fat, muscle, or both. During weight loss, preserving muscle is just as important as losing body fat because muscle supports strength, mobility, metabolism, and long-term weight maintenance.
How to interpret your results
Use your first body composition measurement as your baseline. Rather than comparing your results to someone else's, compare future measurements to where you started.
In most cases, progress looks like:
- Body fat mass decreases while muscle mass remains relatively stable, which often indicates you're losing fat while maintaining muscle.
- Body fat mass decreases while muscle mass increases: this may occur over time during body recomposition, especially when you combine resistance training with adequate protein intake.
- Body fat mass increases while muscle mass decreases: this may be a sign to revisit your nutrition, exercise, or lifestyle habits with your Care Team.
Focus on trends, not daily changes
For the most consistent results, measure your body composition under the same conditions each time, such as first thing in the morning after using the restroom, before eating or drinking, and before exercising.
Small changes from one measurement to the next are normal and are often caused by changes in hydration rather than true changes in body fat or muscle.
Looking at trends over several weeks gives you the clearest picture of your progress.
Because meaningful changes in body fat and muscle mass don't happen within 24 hours, we recommend checking your body composition about once per week under similar conditions. This makes it easier to identify true progress rather than normal day-to-day variation.
There isn't one healthy body fat or muscle mass percentage that fits everyone. These values naturally vary based on factors like age, sex, genetics, and fitness level. For example, females naturally have a higher body fat percentage than males due to normal physiological differences. The most meaningful comparison is how your measurements change over time.
Body composition is only one measure of health
Blood pressure, cholesterol, blood sugar, physical fitness, sleep, and how you feel are all important indicators of progress. Non-scale victories, such as having more energy, feeling stronger, your clothes fitting differently, or improved lab values, are also meaningful signs of progress.
To learn more about how your Withings scale estimates body composition, learn more in this article.
Your body composition is one tool for tracking your health, not a measure of your success. Think of your first measurement as your personal baseline, focus on long-term trends rather than daily fluctuations, and celebrate progress both on and off the scale.
If you have questions about your results or want help interpreting your progress, reach out to your Care Team. We're here to help.
