Fig 1. Study enrollment flow.
CPX = cardiopulmonary exercise test, MRI = magnetic resonance imagery, AEx = Aerobic exercise condition, ST = stretching and toning control condition, AD = Alzheimer’s disease.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.