I used to run .... and run .... and run.
I think the great thing about running is that you can do it any weather (in Australia, anyway) and if you have to travel for work it's easy to pack running shoes and gear so you don't have to miss out while you're away. In addition, it's very time effective fitness training compared with cycling.
I managed 3 marathons during the 80’s and about a dozen half marathons and in 1999 a group of 7 of us ran a non stop relay from Melbourne to Sydney to raise funds for spinal injury research.
Over the years I had meniscectomies on both knees, but the injuries weren’t solely caused by running. It was the running that exacerbated them to the point where they needed surgery, though. All my running was on hard surfaces.
I really enjoyed my running, but I think the difference between cycling and running is that while you can cycle home after a race or an Audax ride, not many people run home after a road running event.
To anyone thinking of taking up running, I echo Doug’s advice regarding appropriate shoes, starting slowly and building up distance. Also, try some duathlons if not triathlon events.
Mrs. and I now do a fair bit of walking and try to get to the UK every couple of years to walk there. Last year we did Wainwright’s Coast to Coast walk and we’ve done a lot of short walks. Dartmoor is particularly good and we also enjoy walking in the Lakes, Wales, Scotland…. All of it really.
I can’t say that walking complements cycling as running can, but it’s very satisfying and is somewhat akin to cycle touring in that you have a goal to aim for and some mild adventure and a lot of fun on the way to achieving it. Compared to Australia, the UK is long distance walking heaven: Rights of Way, marked walking paths, towns closer than 100 km’s apart and even baggage services on the more popular routes. I thoroughly recommend it.
Cheers,
pj