One of the most successful services we provide as personal trainers is to show progress that exercise is creating a positive change in our client’s body. Girth measurements are one of the tools we use to show that progress. I’ve had many clients amazed that they were losing inches without losing weight, but they were willing to keep training because they felt better. I used 4 week intervals for re-measurements, so the difference between 4 weeks & 8 weeks was always dramatic in both weight loss and inches lost. At 4 weeks, some particular girth measurement was declining in inches, but there was not always weight loss on the scale. At 8 weeks, almost all of my clients saw weight loss in addition to inches lost. At that point, I had a working model that longevity pays off.