Why don’t Ironmen walk?
Saturday, March 6th, 2010
Outstanding results from the Bonita Ironman in Taupo today, and – as I type – there are athletes battling to make the finish line. Many of these athletes, for whom completion of the event is a huge achievement, will be walking the final stages of their marathon.
So, if they are going to end up walking – why even bother trying to run? The obvious answer is that running is faster than walking – but is it, especially at the final stages of an Ironman event?
City Walker once race walked a marathon in 3:22. That is now a distant memory, and at a time when he was seriously fit!
So, if a marathon can be walked in 3:22 – surely someone who trained as a race walker could go close to 4 hours as the final stage of an Iroman? How many Ironmen (and women) are slower than that for their marathon? Quite a few, I suspect.
And there would be a major benefit in training. We all know that swimming and cycling are relatively injury-free compared to running as they as non-load-bearing. That enables athletes to log up serious training volume in these disciplines, but running is problematical.
Walking is a very low load-bearing form of exercise, compared to running. A walker’s foot hits the road from a height of about a centremetre, landing on a straight leg (so the bone structure supports the weight) – about 1.5 x body weight on impact, compared to about 2.5x for a runner. This is primarily because walkers do not lift their centre of gravity – it is all about energy-efficiency amd moving forward but not up.
So an Ironman who trained walking could do higher training volumes, and would be less likely to become injured.
Obviously this is not for the top performers, but anyone who contemplates an Ironman performance with a “running” time of 4 hours+ should seriously consider becoming a race walker!
City Walker
Tags: exercise, ironman, marathon, walker | Posted in Walks | 3 Comments »