Effects of a pre-workout supplement on hyperemia following leg extension resistance exercise to failure with different resistance loads oleh Jeffrey S. Martin, Petey W. Mumford, Cody T. Haun, Micheal J. Luera, Tyler W. D. Muddle, Ryan J. Colquhoun, Mary P. Feeney, Cameron S. Mackey, Paul A. Roberson, Kaelin C. Young, David D. Pascoe, Jason M. DeFreitas, Nathaniel D. M. Jenkins, Michael D. Roberts