I believe this project has shed light on number of issues thought to be fact but turn out to be unproven.
1. You use it or you lose it. Percussionists need to be more respectful of the physicality of their instruments and be careful not to underestimate the risk of going rapidly between instruments. Jumping between instruments too quickly leaves us susceptible to injury.
2. General fitness only has positive effects on our mental and physical state which can only improve our ability to perform well for extended years.
3. Musicians trail athletes when it comes to caring for their bodies. However, both musicians and athletes rely on their bodies for their livelihood.