It depends on what you mean by highly. There are some direct biological 'g' factors that you can think of. One would be sleep quality, another brain volume.

It depends on what you mean by highly. There are some direct biological 'g' factors that you can think of. One would be sleep quality, another brain volume. Also, brain damage events like concussions, and probably anesthesia, affect both athletic and mathematical performance. Thus, you should also expect there to be kinds of genetic and congenital developmental deficiencies that do the same. Looking at relationships of reaction time/IQ as well as target practice/ASVAB score, they have a stronger relationship at the low end of the spectrum. Among kids in the 90% decile, you shouldn't see much of a relationship! They've got low difference in 'g' factor, I guess. But if you go down to the 20-50% range, you get, to increasing degrees, all those malcoordinated kids on the playground who seem like they were born with a pre-concussed brain. Obviously, parental mating patterns affect some of the overall correlation, but the way the relationship is stronger at the lower end indicates the presence of true 'g' factors.