You guys and your distances - fair play!
I went to get a 'Gait test' today. A few tests uncovered that I have too much supination in both feet and that in turn is affecting both calf muscles (tore one last year, other one mega tight and sore after 25 days running in Jan).
Tried on some new runners and ended up getting a pair of Saucony Guide 18s. Never paid £130 for a pair of trainers before (although £20 of that was the test) but they felt mega comfy and I can't wait to get out in them.
Here's me with a goal of running a 10 miler this year and you lot are knocking out 29kms! Kudos.
As others have said, don't worry about distances, you'll improve much quicker than you think (as long as you do it properly and don't try and push mileages too far too soon).
This time last year I'd probably never ran more than about 12k or something and now I'm doing 29km workouts - something I never thought I'd do!
Good luck