The ultimate goal of C25K is to get us running 30 minute non-stop runs. And I guess that for anyone who has achieved that, they would not really need to employ further Run/walk techniques to run any 5Ks that they eventually do. Possibly they could also go on to run 10Ks non-stop, building their non-stop running times even further ??
BUT -- for longer distances, half marathon and marathon, for me at least , I could not conceive of NOT using run/walk technique. But, like everything in life -- everything has it's good and bad points - and everything has a price. Run/walk has great benefits -- but it is also seductive and insidious. If I and my body gets used to doing 2/1 ratio over long distances, does a psychological imperative develop in the runner to ONLY do this - or does the runner push on to more demanding ratios. ?? I have been following an American man who, over a year , trained using very short run/walk ratios to finally enter a marathon. he has subsequently gone on to running more marathons - but as far as I can make out, continuing to use these very short ratios (around 30secs/30secs)
All theoretical for me at this time -- but am looking ahead -- and would like to hear from C25K graduates as to their thoughts re this.