Speeding up fat loss as we get a bit older. For some the idea of being over 30 means fat loss starts to become an issue. Being over 40 myself I have certainly experienced weight gain that I was not happy about. I had to examine what was happening during this time. For me getting more body fat than i wanted was the direct result of changes in work stress, lifestyle and the belief I was eating well. The issue is often that fat gain is so slow that we don't realize it until it's already too late. Walking for fat loss, even as we age can be magical. Lets' talk about our history and of nutrition, diet and why we gain body fat. How to lose body fat in your 30's and 40's. Fit over 30, fit over 40.