Shooting moving subject (walking) at f/1.8 - poor hit rate in indoor light

This is probably the most intense low light photography scenario: long jump at the indoor track meet. They run straight at you at top speed and then leap in the air as you shoot. The D700 worked very nicely in this situation using AF-C, single point, handheld, about 1/500th, f/2.8. Quite a bit of noise with a 3200 iso, but that can be cleaned up pretty well in a NR app, as in last pic: