Train by time or by distance?

Runners know best what distance is.
Distance means so little when someone means so much.
A smile is the shortest distance between two people.
The greatest distance between two people is misunderstanding.

running.competitor.com - Should you train by time or by distance?

The answer is both approaches are valuable.

See also:
runnersworld.de - Wichtiger als das Tempo sind allerdings Länge und Anzahl der langen Läufe.