1) Your weight fluctuates. A lot.
The time of day, time of the month, how much water you have drunk, how much alcohol you have drunk, when you last had a poo, your hormones. They will all affect the number on the scale so it’s not the most effective way to track your progress and using weighing yourself alone can be inaccurate and disheartening.
2) A number on the scales won’t make you happy.
Being comfortable in your body won’t automatically happen when you hit a certain number on the scales. Everybody has some body hand ups regardless of their weight or size. Focusing on feeling strong and healthy will help you feel more positive about yourself in a way a number can’t and help prevent an all or nothing kind of outlook on your fitness journey, where how well you week went depends on one number.
3) Your weight isn’t an indication of your health or fitness level.
Have you ever seen one of those line ups of several women who all weight 60kg. You could weight the same as someone else and have a totally different body shape. Someone who is a size 10 could weigh the same as someone who wears a size 14. Height, muscle, body type – how we ‘wear’ a certain weight is different from person to person, and, unless you are medically obese, how fit or healthy you are has little to do with the number on the scale.
Just a note – muscle doesn’t weight more than fat. A pound of muscle weights a pound and a pound of fat weighs a pound. However muscle is less dense, so if you reduce body fat and build muscle you might not weigh less but you will look leaner.
Heather Sherwood Fitness 
The dense vs weight thing always annoys me, but I get where most folks are coming from. Sometimes when people say that to me, I respond with ‘what weighs more 100 pounds of gold bars or 100 pounds of feathers?’.
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Can you imagine how many feathers you’d need to weigh 100 pounds haha!
When people say it, it’s normally said in the correct context – as in if you have more muscle you’ll weigh more than you people think you do by looking at you.
Weight is just such a randomly worthless thing. It is what it is but matters so little in real terms.
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