Football players for Michigan and Michigan State along with a group of students at North Carolina have raised their fists during the US national anthem on Saturday.
The gestures at the games come following a week punctuated by riots in Charlotte, North Carolina, and the killing of an unarmed black man in Tulsa, Oklahoma.
Three Michigan State players - Delton Williams, Kenney Lyke and Gabe Sherrod - held their right fists in the air while standing on the sideline before the No.8 Spartans hosted No.11 Wisconsin.
``Whether somebody salutes, puts the hand over their heart or does something else, everybody has a choice to make,'' Michigan State coach Mark Dantonio added after the Spartans' 30-6 loss.
``Our young people are in college, and I can promise you one thing, that when the flag is presented in some respect, I guess it becomes much more important now. It's not just, oh by the way, we'll just stand for The Star-Spangled Banner.
``All I can do is try and lead the best way I can, and be positive and accepting to our football team and our players,'' the coach added.
Several players for No.4 Michigan also had their fists up before facing Penn State in Ann Arbor, Michigan.
Most college conferences play the anthem before the teams take the field.
The University of Michigan is 10 kilometres from Eastern Michigan University, where chanting students marched on the field on Friday night after the school's 27-24 victory over Wyoming. The students were protesting racist graffiti on the campus earlier in the week.
Before North Carolina hosted Pittsburgh, students wearing black shirts remained seated with fists raised. Some 60 to 70 black and white students participated.
The protests date to the refusal by San Francisco 49ers quarterback Colin Kaepernick to stand for the anthem before NFL preseason games. He cited racial injustice and police brutality among the reasons. Since then, other athletes across the country have made their own protests.
Michigan coach Jim Harbaugh was Kaepernick's coach for four seasons in San Francisco. Last month, Harbaugh said he supported Kaepernick's motivation to speak out but took exception to his method.
