USA Outdoor Track and Field Championships
At the 2013 USA Outdoor Track and Field Championships, she improved her personal record by half a second with a run of 53.83 in the final to win her first national title in the 400 m hurdles. Muhammad has represented Nike since 2013. At the 2014 USA Outdoor Track and Field Championships, Muhammad qualified for the 400 m hurdles but did not start. At the 2015 USA Outdoor Track and Field Championships, she placed 7th with a time of 57.31.