VINH TONG

Lower on the chart is faster — a line falling to the right means improvement.

Lower on the chart is faster — a line falling to the right means improvement.

Lower on the chart is faster — a line falling to the right means improvement.

Minutes per mile over each stretch of the course. Lower is faster, so a line rising to the right means slowing down. Colour runs pale for the earliest editions to dark for the most recent; tap a year to show or hide it.

Minutes per mile over each stretch of the course. Lower is faster, so a line rising to the right means slowing down. Colour runs pale for the earliest editions to dark for the most recent; tap a year to show or hide it.