I personally like how a person who cross trains looks. I find that runners who don't do upper body weights just look skinny. I think atleast upper body exercises balance out the runner's legs...and leads to better whole body fitness levels. I've heard that upper body training also fine tunes a runner's performance too. But I agree, whatever gets you moving is worth it. If it's 'just' running...so be it. If it's a variance of activities that's great too. It's nice to have an activity you reasonably enjoy to fall back on incase you get injured doing the activity you love. It makes recovery a little more manageable.

I respect specificity in training, but everyone has different goals and abilities.
I've been able to finish top third/top quarter of most races I've entered, and I'm happy with that. I might possibly do better if my training regime is augmented and controlled. But, do I want to?
I'm coming up to my 49th lap around the sun, and I love: to run, to compete, to go on 100+Km rides on my bike, to x-country ski, to snowboard, to hate golf (but golf anyways), and especially that 50 yr olds are talking about being more competitive at marathon distances rather than their RRSP's.
I'm not advocating being non-competative, but for me to excel at one activity would mean to lose out on the fitness level and enjoyment I get from being diverse.
In the end-when my kids come to put me adrift on that ice floe, they're going to have to catch me first.

I'm like everybody above. I only run. Yeah, it's probably not a good thing but I haven't felt the same motivation for other stuff. Running is the only sport I've ever - in my life - made a commitment to. I never did anything athletic before I started running. I hate gyms and gym culture. I don't really relate to other sports... it's also time. And, frankly, money. I cannot afford a fancy spin class, yoga lessons and a membership to use machines at a gym. The only people I know who can do all that stuff either have a gym in their building/workplace or seem to have enough spare time and money for it.

Getting injured is a good incentive to cross train though so maybe I'll make more of an effort.

For now, my only cross training is the time I spend on my foam roller keeping my IT band in line :-)

At first read, I thought I had just the Kenyan Cycling Association to worry about. Now I see that Gord has set up some age-group grudge match between Peter and me. Oh, great...
Approaching the age of 50, if I reach an average life expectancy, I have yet another 25-plus years to carry myself around in this body. Therefore, I'd better get some exercise. And, years ago, I found out I enjoy running, so I run. In fact, I enjoy it so much, that I run exclusively. But, if I didn't run, I'd certainly have sought another activity to keep me active.....I might be playing that squash game, doing yoga, swimming or simply walking. If you are inactive, think about various activities you believe you might enjoy. Try one. If you don't like it, then try another....there are plenty. Perhaps you'll find one form of exercise that you'll immerse yourself in. Or you may be one who found a variety of ways to gain the benefits of physical activity. And, at the worst, if you do not find something that you enjoy, you'll at least be active for years to come as you try out all those various choices!

I think if you're finding your "clunky" bike is too uncomfortable to ride, it's time to upgrade. Much like running shoes, the proper bike for your frame and fitness level will make an incredible difference in your enjoyment of the activity. A few years ago I bought a cheap bike from Canadian Tire and hated it. It was heavy. Its gears were stiff. It's seat was uncomfortable and its frame was way off for my legs. Then I tried out a friend's moer expensive bike and was amazed at the difference. Look for something with a lightweight, alloy frame that fits your inseam height with a seat that can be adjusted laterally as well as vertically. You may have to pay a bit more (around $500 and up) but it's really worth it. I found my bike a good way to keep my cardio fitness while I've been unable to run due to plantar fasciitis the past couple of months.
Thanks.

When is the last time you saw someone in your age group in your club on a bike? Run, run run. Isn't Bryan Mulligan going to be 50 in six weeks? Do you want to be chasing him?Specificity of training is the key. You'll have to invest in linament or something if you start that silly weight stuff.

I'm a lot like you Peter. Cross-training does seem to take me a long way from where I want to be, which is running marathons. But a couple of years back I trained for a fundraiser duatholon. I couldn't believe how much the biking improved my running. Made it "easier". I ran my easiest marathon that fall (felt great, less recovery pain and was 2 minutes from my PB). I attribute that to a long bike ride the day after my long run every week. Of course, I never kept it up! But seeing value in something doesn't mean you'll always do it. Just look at all the people who don't exercise. But I'll leave that for another blog post! I enjoy reading your blog. Keep it up!