Break through the plateau and curate a meaningful, impactful fitness experience with this science-based approach to exercise and wellness over the age of 40. After 40, the average person loses 7% of lean muscle mass each decade, and performance can drop by up to 5% per year. No matter how much you love your movement practice--whether it's running, pilates, or spin classes--your body isn't responding like it used to in your 20s and 30s;...