Effects of a laboratory-based aerobic exercise intervention on brain volume and cardiovascular health markers: protocol for a randomised clinical trial oleh Kirk I Erickson, Matthew F Muldoon, Stephen B Manuck, Anna L Marsland, Cristina Molina Hidalgo, Audrey M Collins, Mary E Crisafio, George Grove, Thomas W Kamarck, Chaeryon Kang, Regina L Leckie, Madison MacDonald, Javier Rasero, Mark R Scudder, Daniel Velazquez-Diaz, Timothy Verstynen, Lu Wan, Peter J Gianaros