1 year for Full IronMan

I don't see why not ... but a whole year of intensive training may likely cause you to burn out mentally and physically.   It sounds like you have the base to start training for the two longest legs of the IM.  If you know how to swim, the ramp up to the IM swim distance isn't as much work as the other two legs.

I went from the background of running marathons to doing my first IM in about a year.   I spent the first 6 months of the training having about fun and doing shorter distances to keep my training and my base honest.  My eyes were always on th IM but I didn't go hard core for the first 6 months.  The next 2 months were about building up the base I had built during the first 6 months so that I can handle the IM training.  The next 4 were about going full IM training hardcore mode.  By hardcore, I don't mean 100 mile bike ride and 20 mile run every weekend.  By hard core, I mean strict adherence to my IM training plan.

I think that most knowledgeable people/coaches will tell you that if you went hardcore intensive training for 12 months that you are setting yourself up for failure. 

yes

You got a little verbose there...he was looking for a short answer.  :-)

So would answering "No." 

That's your opinion, and your entitled to it. 

Here's my experience:  I've been "active" for 4.5 years.  Did my first tri in 2005, a half Ironman in 2006.  My longest race in 2007 was an OLY.  In 2008 I did zero tri's.  We had to do some work on the house and I went on a 2-week backpacking trip.  Jan-July '08 I ran a total of 224 miles (32 / month), swam 60K yards (8500 / month), and rode 20 miles (not worth calculating).  Not exactly Ironman preparation.  I registered for IMCdA '09 (6/21/09) and ramped up starting August 1, 2008 to finish in 13:38. 

So, to the OP, yes, it can be done, particularly if you've already got some endurance sport experience as you indicate.  Whether you'll do so is really up to you. 

You are right.  There is no way you could do an IM with that mindset.  Change your thinking.  "What one man can do, another can do." 

If you can run 1 mile and bike 10 miles, I submit that you can do an IM with 1 year of training.  You are not gonna KQ but, if you train hard for a solid year, you can finish an IM.

~Mike

Agreed- you can do this in 1 year if you train smart and stay injury free

All depends on your goal. To finish with a smile? To go sub 12? To KQ?

I think the time limit is 17hrs not one year

while more info on what you consider active would be great, but I'd vote yes you can.

It might be mentally challenging to train for one race all year, maybe but a sprint/oly for the first 4 months goal.  about 5-6 months out do a 1/2 IM.. then start training for your IM

Rock on Mr Jazz!

~Mike

You can.  Its all about work ethic, you already have the endurance base, now you need the cycling and swimming training.  I signed up for IMSG with 12 months to go with a similiar background and with 9 months out I'm no longer concerned at all about 'just finishing'.