His genetic predispositions put O'Donnell at risk for a 'widowmaker,' but now he says he's been cleared for a return to full training.
The type of heart attack is colloquially known as "the widowmaker"—but the Kona runner-up says he's doing better now.
Successful parent-triathletes share their tricks and tips for making it all work.
Aquasphere’s new initiative, A Lens for Every Condition, helps you pick a lens specific to your training or racing light conditions.
In this Triathlete Live sponsored by Tonal, Triathlon's favorite power couple chats about their hopeful race schedules for 2021, balancing training with a young family, their biggest race mistakes, and more.
Kona runner-up Tim O'Donnell talks about what he learned after bouncing back from an injury last year and how a brownie helped him win over Mirinda Carfrae.
American Tim O'Donnell, who is fresh off of a second-place finish at the 2019 Ironman World Championship, joins us in our studio in Boulder to talk all things triathlon.
Just a few days after stepping off the podium at Ironman Boulder, Tim O’Donnell and Matt Hanson joined Triathlete.com for our Facebook Live AMA show this week.
O'Donnell talks about the drastic changes he's made in his training, the head-to-head battle with Braden Currie, and managing the balance of parenthood with elite-level racing.
Bob Babbitt chats with Tim O'Donnell, fourth-place finisher of the 2018 Ironman World Championship.
American Tim O'Donnell is looking to return to the podium at this weekend's Ironman World Championship in Kona.
"As a person, Mark's [Allen, his coach] biggest complaint about me is that I'm too nice."
This weekend O'Donnell is literally from home, aiming to earn his Kona start this fall.
American Tim O'Donnell didn't have the finish he was hoping for, but he says he's proud of how he fought through the day and gambled to go for the win.
Tim O'Donnell will race aboard this hand-painted Trek 9 Series Speed Concept at Saturday's Ironman World Championship.
American Tim O'Donnell says that his third-place Kona finish in 2015 has given him the confidence that he knows he can win this race.
Earlier this year, Tim O’Donnell announced he was switching coaches to work with six-time Ironman world champion Mark Allen.
Athletes competing in Sunday’s inaugural Challenge St. Andrews triathlon woke up to blue skies and beautiful conditions.
Tim O'Donnell announced today that he is seeking a cyclist and runner to join him on a relay team at the full-distance Challenge Atlantic City on June 29.
Bob Babbitt chats with two-time Ironman world champion Mirinda Carfrae and Ironman Brazil champion Tim O'Donnell.
Attendees packed the house at Runner’s Roost in downtown Denver last night for a very special evening presented by TriRock Colorado.
Less than a month out from their wedding day, we have some fun with the superstar triathlon twosome of Tim O’Donnell and Mirinda Carfrae.
2013 GoPro Ironman World Championship fifth-place finisher Tim O'Donnell joined Bob Babbitt on Breakfast with Bob and Paul.
How do you balance the need to keep pace with the front of the race while making sure to stick to your own game plan?
Tim O’Donnell narrowly missed the elusive eight-hour mark, finishing in a course record time of 8:01:31.
Two-time Ironman world champion Tim DeBoom shares his thoughts about what it takes to win, and which Americans might have it.
American Tim O'Donnell reflects on his 70.3 San Juan race, talks a little bit about his competition and gives advice for dealing with cold water.
Sunday will be just the third time Ironman 70.3 San Juan has taken place and there are only two winners in its young history.
Some couples meet through friends, at a bar, on Match.com. Mirinda Carfrae and Tim “T.O.” O’Donnell met in the med tent.
A big sponsorship coupled with the news that O’Donnell will marry Mirinda Carfrae in December means he is set up for an eventful 2013.
Tim O'Donnell exited the bike with the main chase group and then held on for fourth at the Ironman World Championship 70.3.
Tim O'Donnell will look to add another world title to his resume this weekend at the Ironman World Championship 70.3 in Henderson, Nev.
As Timothy O’Donnell tackles the iron distance, he steps into the role as an American with a legitimate shot at ending the U.S. drought.
Ironman 70.3 U.S. Champion Tim O'Donnell, who is also an ambassador for Team RWB, will be speaking at an event in his hometown.
Thanks to a race date six weeks after the Ironman World Championship, Ironman Arizona will welcome one of the toughest pro fields of any Ironman this year.
The Kona course has a way of humbling—no, demolishing—athletes like no other Ironman. The heat, the unforgiving course, the world championship-demanding effort—and did we mention the heat? We spoke with three top pros forced to pull out of last Saturday’s race and asked them what ultimately ended their day and dashed their Kona hopes.
Multi-sport stars were out in force at Sunday’s Boulder Peak Triathlon, part of the newly established 5150 Triathlon Series and a qualifying event for the Hy-Vee 5150 U.S. Championship.
Inside Triathlon magazine’s July/August issue features an exclusive profile of Tim O’Donnell, who recently made his Ironman debut with an 8:09:50 runner-up finish at Ironman Texas, behind Spain’s Eneko Llanos.
Americans Tim O’Donnell and Kelly Williamson beat out tough competition to take the victories at the inaugural Ironman 70.3 San Juan event in Puerto Rico.
USA Triathlon has named Laura Bennett and Matt Chrabot the Olympic/ITU Athletes of the Year for 2010. Tim O'Donnell and Amy Marsh are the Non-Olympic/ITU Athletes of the Year.
American triathlete Tim O'Donnell will focus on the Ironman World Championship in 2011.
Germany’s Michael Raelert became the first athlete to repeat on the Clearwater course, while Great Britain’s Jodie Swallow led the women’s race from start to finish to take her first Ironman World Championship 70.3 title.
The 2010 men's Clearwater field features a mix of fresh faces and veterans, all looking to dethrone Germany's Michael Raelert.