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re: Could you Finish an Ironman in 3 Days?

Posted on 11/4/26 at 10:23 am to
Posted by Bestbank Tiger
Premium Member
Member since Jan 2005
84006 posts
Posted on 11/4/26 at 10:23 am to
OT yes, IRL no
Posted by jaytothen
Member since Jan 2020
8972 posts
Posted on 11/4/26 at 10:25 am to
quote:

Could you Finish an Ironman in 3 Days


Your wife only takes 10 minutes to finish me
Posted by Deadmanshand
Member since Jun 2026
654 posts
Posted on 11/4/26 at 10:26 am to
Not now. Ten years ago, yes. The toughest part would be the swimming. The biking and running I have done before.
Posted by Ozarkshillbilly
Missouri Ozarks
Member since Apr 2025
572 posts
Posted on 11/4/26 at 10:26 am to
I have done two in my life. I couldn't do one now though
Posted by Lonnie Utah
Utah!
Member since Jul 2012
36816 posts
Posted on 11/4/26 at 10:28 am to
quote:

And congrats after a mile you're almost halfway done with the swim.



Exactly. Was just giving pacing info. The 2.4 miles is 110% the hardest part. On top of that, and something not mentioned here yet is, you're not swimming in a 80 deg pool. Most natural waters are significantly colder than that. That's a factor as well...
This post was edited on 11/4/26 at 10:30 am
Posted by Ingeniero
Baton Rouge
Member since Dec 2013
23879 posts
Posted on 11/4/26 at 10:28 am to
I could, but I also run 40+ miles per week and have done a century ride with relatively little prep. The swim would be the hardest part for me.
Posted by Tyga Woods
South Central Jupiter Island, FL
Member since Sep 2016
43601 posts
Posted on 11/4/26 at 10:29 am to
3 days? Yeah.
Posted by Stinger_1066
On a golf course
Member since Jul 2021
4323 posts
Posted on 11/4/26 at 10:32 am to
quote:


Most people that say yes are lying, but do you expect people to be honest behind a keyboard?


Not sure why you say that.

I would not say yes if I knew I couldn't do it.

I'm 66 years old, and I've maintained my cardiovascular healthy my entire life. I still run several miles daily. I have a pool and swim laps daily during the summer. I was a lifeguard in my younger days. I've also ridden long distances on a bike many times.

I couldn't go out and do it tomorrow. But if I trained for a month, I know I could pull it off over a 3-day period if no time limit was enforced, other than must finish in 3 days.
Posted by Suntiger
STG or BR or somewhere else
Member since Feb 2007
36830 posts
Posted on 11/4/26 at 10:34 am to
quote:

The bike is a different animal and the pain in the taint after an hour for most people would make them quit, doesn't matter if you're going 18 or 12 mph. The untrained taint is easily defeated.


Agreed. I have a P3 with an Adamo Prologue and years in saddle though. I think I’d be okay.
Posted by StrongOffer
Member since Sep 2020
7428 posts
Posted on 11/4/26 at 10:34 am to
4. Full Ironman

Swim: 2.4 mi (3.9 km) / 0.8 mi per day

Bike: 112 mi (180.2 km) / 37.33 mi per day

Run: 26.2 mi (42.2 km) / 8.73 mi per day

I think it would be very challenging for me. But if time is not a factor, I think I could do it in 3 days with stops for rest.
Posted by Weekend Warrior79
Member since Aug 2014
22688 posts
Posted on 11/4/26 at 10:36 am to
quote:

Not sure why people seem to be saying the swim would be the hardest part

Because very few people swim for distance, and I am sure even fewer actual swim in open water. This is the part that would have me the most concerned as I have never swum in open water and had to deal with currents or waves.

The 112-mile bike ride would be taxing; especially coming off of the swim the day before. The longest I have ever sat on a bike in a single day was just under 2 hours. Do not recall how far that ride was (doubt it was anywhere near 50 miles as it was a leisure ride), or my speed.

The final 26.2 mile run/walk would require a lot of mental fortitude. If this was all I had to do, or was fully rested/healed; no problem. But after swimming over 2 miles 2 days ago, I am sure I am still feeling the effects of that. And then coming off of a 112 mile bike ride the day before, my knees and ankles would be in agony.

I believe I could do it, but it also would not surprise me if I failed if the plan was to show up in 2 days and try to knock it out this weekend.
Posted by Wtodd
Tampa, FL
Member since Oct 2013
68665 posts
Posted on 11/4/26 at 10:36 am to
quote:

Could you Finish an Ironman in 3 Days?

Sure....if I could use my truck and boat
Posted by Bunsbert Montcroff
Boise ID
Member since Jan 2008
5798 posts
Posted on 11/4/26 at 10:50 am to
quote:

Mile swim in a pool for a beginner takes about an hour. I'd say in open water just over that.

there are people who are decent pool swimmers who get in open water and freak out. getting punched or kicked in the washing machine is no joke, nor is jumping into cold water (look up "cold water shock"). lots of pool swimmers don't practice sighting either and wind up swimming much more than they need to (for example, going way wide around buoys).

i consder myself a decent swimmer and there have been events where the open water swim was tough - mountain man triathlon at 7,000 feet in flagstaff, az where i lost my breath and had to go to my back. ironman new orleans 70.3 when the swim was in south shore harbor at lakefront airport and the waves and chop from boats and jet skis, and the marine fuel mixed in the water made it pretty brutal.

edited to add: i think lsufan444 did ironman new orleans 70.3 the same year i did in southshore harbor!
This post was edited on 11/4/26 at 10:54 am
Posted by Cdawg
TigerFred's Living Room
Member since Sep 2003
62549 posts
Posted on 11/4/26 at 11:05 am to
quote:

The untrained taint is easily defeated.

Posted by Tiger Ryno
#WoF
Member since Feb 2007
109433 posts
Posted on 11/4/26 at 11:09 am to
I would drown. Never make it to the bike.
Posted by LSUAlum2001
Stavro Mueller Beta
Member since Aug 2003
49588 posts
Posted on 11/4/26 at 11:09 am to
Sure..
Posted by Mingo Was His NameO
Brooklyn
Member since Mar 2016
39021 posts
Posted on 11/4/26 at 11:09 am to
quote:

Swim: 2.4 mi (3.9 km) / 0.8 mi per day

Bike: 112 mi (180.2 km) / 37.33 mi per day

Run: 26.2 mi (42.2 km) / 8.73 mi per day


Not how it works
Posted by ell_13
Member since Apr 2013
88560 posts
Posted on 11/4/26 at 11:13 am to
quote:

you are not obese, don't have a serious physical handicap, and can swim, you can finish an Ironman with some basic training.
Define “basic training” because it still takes a ton of endurance to finish in the allotted time. Couer d’Alene was a nightmare for most people a few years ago when the temp hit 110° and the road was melting the bike timers.
Posted by Zappas Stache
Utility Muffin Research Kitchen
Member since Apr 2009
43826 posts
Posted on 11/4/26 at 11:13 am to
The swim and bike I could easily, but since I'm old and don't run much anymore that would be tough.
Posted by Aguga
Member since Aug 2021
4159 posts
Posted on 11/4/26 at 11:14 am to
Which way is the current flowing?
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