Sometimes we can become too focused on the trees and lose sight of the forest. This composite score tells how well you are aging across many systems. It's a weighted average of your other ages. Genetic inheritance, lifestyle factors, your current age, diseases, and therapeutic interventions all play a part in this and the other biomarkers. On average, the aging process diminishes your functional physiological capacity by 1% to 3% per year.
Some treatments benefit one system but cause adverse effects in another. High intensity exercise can improve your arterial and pulmonary systems. But too-intense exercise can age your immune system.