The exact weight doesn't matter too much, you are looking for a downward trend. Use your scales for weigh ins. My doctors scale always weighs several kilos heavier than my home scales, but both show a loss of 8kg, so the exact numbers don't really matter.
Any particular scale can be off by several pounds. And I don't think anyone on these boards can necessarily say whether your scale or your doctor's is more accurate.
But honestly, which scale is technically more accurate doesn't really matter. What is more important are changes over time. Be consistent, try to weigh yourself at the same time of day and use just one scale to track your progress over time.
Also, consider using the tape measure to track your progress, rather than the scale. Lost inches is a better measure of body fat, and the tape is far less sensitive to changes in your hydration levels and water weight than the scale.
It bugged me so much that my scale weighed 7 pounds less than the doctor's that I bought a new digital. It weighs exactly what the doctors does. I always weigh with what I'll have on, and take off shoes, and weigh just before walking out the door to go to the doctor. Like others have said, if you weighed at home then ate and drank, then went to the doctor you really don't know how far off your scale is (if at all).
10 lbs is too much for clothing and sneakers I think. If I'm wearing a hooded sweatshirt and yoga pants I weigh 3 lbs at most more than when I'm naked. One thing you can do to check your scale at home is weigh some weights and see if it equals the right amount. That's one way you can tell if your scale is off or not. The key to tracking your weight though is to be consistent. Pick a scale and weigh yourself at the same time of day, same time of week.
Fitness Minutes: (3,654)
27 5/8/12 10:29 P
My one friend who has been trying to lose weight for a year now gave me great advice - don't worry so much on the weight because you're going to gain weight if you drink/eat anything right before and you're going to be gaining weight at some point if you're gaining muscle because remember muscle does weight more than fat. Instead its better to start looking at inches, and because those arent going to be as drastici just look about once a month/2 weeks and you'll slowly start noticing a difference. Look at the way your clothes are feeling.
Now if you are tracking by lbs the best thing to do is weigh yourself right when you wake up before you eat or anything. Therefore its a consistent time to base unlike during the day where the amount and when you eat are going to vary and also just keep to one scale because all of them can be slightly callibrated wrong and you don't wan to be giving yourself the wrong message that you're just yoyoing back and forth
Fitness Minutes: (14,252)
9,619 5/8/12 9:44 P
When did you go to the doctor's, and what did you do before then? Did you eat or drink anything at all?
You can "gain" several pounds in the course of a day just from the volume of the things you put in!
Fitness Minutes: (112,042)
46,222 5/8/12 9:23 P
I recommend that you go by the weight of just one scale and use that number for tracking purposes. Remember your weight is not a static number. In fact, one study showed that your weight can vary by as much as 7-10 pounds in the course of a single day, depending on your hormones, hydration, workouts and nutrition.
I went to the doctor's and weighed in at 145, however I weighed myself this morning and it was 139. I made sure my scale was zeroed out and the nurse took off 10 pounds for clothing and sneakers. I have a wii fit board should I use that?
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