When you're dealing with small distances, you can increase the increments much more significantly. Just start ratcheting it up, and pull back if you start feeling adverse effects. If you subscribed to that 'only increase by 10% a week' bumwash, you'd take about 8 years to go from your first 1km to mara.
Depends on the individual. Ex runner at close to race weight living fairly active lifestyle can most likely ramp up quicker than not-a-runner getting off sofa for first time since starting desk job 10yrs ago.
When you're dealing with small distances, you can increase the increments much more significantly. Just start ratcheting it up, and pull back if you start feeling adverse effects. If you subscribed to that 'only increase by 10% a week' bumwash, you'd take about 8 years to go from your first 1km to mara.