There's a page in my book, Living The Fitness Lifestyle, titled "Self Delusion and the Scale." I quote Jack LaLanne (early photo at left) who said long ago, "Your waistline is your lifeline." LaLanne was and still is way, way ahead of his time. He's now in his 90s and still working out.
Reuters reports the latest validation of LaLanne's comment in an article, (the) "Tape measure, not scale, key to knowing heart risk."
Too much emphasis is placed on body weight alone, when stripping down, looking in the mirror, and putting a tape measure around your waist are better indicators of health and fitness. The report is definitely worth reading.