How does antalgic differ from trendelenburg gait?

Both abnormal gaits: Watch the leg that is weight bearing. In an antalgic gait there is a shortened stance phase relative to the swing phase (like when someone doesn't want to step fully on the leg). Whereas from a frontal view, a trendelenburg gait usually has a muscle weakness in the hip abductors on the leg that the person is standing on and a tilt (hip drop) noted on the leg that is non-weightbearing.