Four by eight-hundred meters would be an excellent Olympic and w.c. event. Nations known for sprinting can find four 800m athletes, nations known for Marathon racing can find four 800m athletes and of course there are nations known for middle distance racing. Four by 400m should have been added to Olympic and w.c. schedule before 4 x 400m mixed gender. Most nations do not have elite or near elite 400m athletes. On an international level, women will race 4 x 400m in less than 8:15 and men will race 4 x 400m in less than 7:10. Events would be completed between tv commercial blocks. Note: At Olympics, S&D is as popular as T&F on television. S&D can fit most of their events between commercial blocks.