Comment by MengerSponge

Oh, I didn't realize there were 100m, 200m, 400m, 800m, 1500m, etc walking races.

Is the variety in locomotion in the races you listed regulated by the governing body? Like, would you be DQ'd if you skipped the last 50m of a 100m dash?

For the record, I would fully endorse a "hurdles" equivalent in swimming: put an obstacle every 10m that the swimmers have to go under. Make the lanes zig-zag.