Thank you for your feedback Michael. Muscle size is not important to me as I have no intention to be a body bulder but I care about quality and lean muscles to keep me flexible and agile as I get older. The gold standard to measure muscle quality is DEXA Scan which is a bit expensive but it is valuable. It also can measure fat percentage accurately. In addition I use a device called SCULP at home to check muscle quality and fat percentage. It is not as accurage as DEXA scans but still gives some idea.