Transition from Marathon to Ironman

In order to pass my annual IPPT, i started to go to the gym and start doing weights and running a few years back. I would say my cardio based are accumulated as a result of running.

Is it difficult for runners to transit into a triathlete? I could say it depends on individual. Exactly what, you know your body better than anyone else.

For Marathon, a typical cutoff time is 7 hours, whereas Ironman is 17 hours.

Is it difficult for you to complete a marathon within 7 hours when you put in decent hours of training mileage? With similar kind of training mileage for other disciplines invested, finishing an Ironman within 17 hours is similar to finishing marathon within 7 hours.

Is it difficult for you?

P/S: If you intend to take the plunge, be prepare to put in the required long training hours