Congratulations to SML for now being a 0.06s faster in 400m than Mu was when she was 18 years old.
I really don't get Mu and her coach. Talking about 1500m when she has (had?) that kind of speed?
What she should do is to concentrate on getting the US record in 400m and see how well she can do as a 400m runner before she further on torturing herself with 800m, or even worse, with 1500m.