This is physical and mental,
The movement is physical and mental, it means it will change you COMPLETELY are that you need to change yourself. Change your mindset, and by physical I think he doesn’t mean on our bodies, but things we physically do, say.
He could also mean that the oppression they face is/was both mental (racism) and physical (slavery).
To help improve the meaning of these lyrics, visit "HiiiPower" by Kendrick Lamar Lyrics and leave a comment on the lyrics box