Aerobic exercise increases brain vessel lumen size and blood flow in young adults with elevated blood pressure. Secondary analysis of the TEPHRA randomized clinical trial by Lapidaire, W, Forkert, ND, Williamson, W, Huckstep, O, Tan, CMJ, Alsharqi, M, Mohamed, A, Kitt, J, Burchert, H, Mouches, P, Dawes, H, Foster, C, Okell, TW, Lewandowski, AJ, Leeson, P