Because Google gives you answers but leaves you to put those answers in context.
By contrast lurking on a forum gives folks some idea of whose opinions within a group of like minded folks they might trust more. rightkyly or wrongly they prefer to filter information via a 'social network.'
Thanks guys. To clarify: It's more like 15-20k a week, I don't race for parkrun every week - I try to aim for a PB once a month maximum. I do 3k minimum on the treadmill, pushing up the speed and aiming to run a longer distance at the faster speed. I take on board about how often and how long I run - I currently run 3 times a week, and I'm walking around 5k or more per day every day (big dog) plus swimming. I'll have to look into squeezing another one or two into the week, and extending the weekday runs.
Other than that - it's the info about longer races and all speeds that I'm interested in as well. I want to get rid of the feeling that I can't do half marathon because I'm too slow, for example, as I'm hoping that in training for a HM I'll start speeding up on the shorter runs anyway.
you should run more often and at a nice easy pace that allows you to chat if you want. Better yet use a heart rate monitor and run at about 70% of your maximum heart rate. Building up your weekly mileage that way will do more for your park run than caning it every few weeks.
You've probably already worked this out but following a half decent half marathon training plan will see you doing the above as a matter of course. Good luck.