So it seems that there maybe some unfairness involved in athletics track design. Perhaps left handers are disadvantaged by having to run counterclockwise.
A figure-of-eight track would be possible but would lead to collisions with lapped runners (or if using an overpass, questions about the effects of uphill vs downhill).
Today’s invention is a way to even up any such imbalance.
Since running around circular curves at constant speed requires, according to simple Physics, no expenditure of work beyond overcoming friction in the direction of motion, I’ve assumed that there is no difference between running bends of differing radius.
The problem of fair track design thus becomes one of ensuring equal total stretches of left- and right-handedness.
The shape above provides this, together with straight sections for sprint events.