I have never run, well I ran as a kid, but never as a way of building aerobic fitness. At 59 years of age I though it might be an idea to do some short runs if not for another reason other than the "use it or loose it" effect of the human condition. So I went eagerly to a grassy track with a friend who is a competition squash player to do some sprint work. Session was fairly easy lasted 30 minutes. Next day I was a little tight in the hamies, Rode the following day, about 40 k into the ride legs gone, looked down to see just blubbering girly legs.
Today the day after the ride I'm still kind of sore. Now before you write a long reply about explosive movement and muscle fibre damage similar to weight training. I'd just like to add, I know all that. But I'm motivated by a deeper understanding of my aging body. And yes, that was a truly dumb thing to do, nevertheless I been coming to terms with a strength imbalance, specifically a weakness, even more precisely, a lack of endurance in my glute meads. Running seem like the best thing to do at this stage. Longer runs than 400 metres maybe a better idea then sprint work.
Anyway the question is … ya think cyclist should run ?