Before revision: If the chair offers lateral lumbar support, this can help to alleviate swaying, but much public transportation features spartan seating design, and spreading the legs to increase the base of support is the natural option to maintain a secure posture (citation needed) .
After revision: If the chair offers lateral lumbar support, this can help to alleviate swaying, but much public transportation features spartan seating design, and spreading the legs to increase the base of support is the natural option to maintain a secure posture .