Training for your first triathlon? A veteran coach shares 5 training upgrades

With more than 25 years as an endurance athlete, coach Doug Guthrie knows how steep the triathlon beginner learning curve can be. These are the training tools he recommends for tracking workouts, cycling smarter and taking some of the guesswork out of training.

“The vast majority of the people I coach are [triathlon] beginners,” says Doug Guthrie, founder of GU3 Training, a USA Triathlon Level 1 coach, TrainingPeaks Level 2, and U.S. Masters-certified coach. “I always tell people when I first speak with them that I’ve made every mistake there is to make, so I’m going to do my very best to keep you from making those mistakes and just shorten the learning curve.” 

Guthrie knows the learning curve firsthand: “I was terrible at the beginning,” he says, and over 25 years later, he has five training upgrades he recommends to beginners based on his experience and years of coaching athletes.

Doug Guthrie’s training upgrades for beginners at a glance:

Smartwatch to track training: Garmin fēnix 8 – 47 mm, AMOLED, from $1,100

Carbon bike wheels: HED Vanquish Pro Wheels, from $1,430

Indoor smart bike trainer: Wahoo Kickr Smart Trainer, $1,050

EXPERT SPOTLIGHT

IN CONVERSATION WITH

Doug Guthrie

USAT Level 1, TrainingPeaks Level 2, and US Masters certified coach

Doug Guthrie is a USAT Level 1, TrainingPeaks Level 2, and US Masters-certified coach, and the founder of GU3 Training. He supports athletes, from beginners to elite competitors, through every aspect of their training, encouraging them to go beyond what they believe they're capable of.

Doug is also a successful athlete in his own right, having finished 30 IRONMAN-distance races, numerous 70.3s, and qualifying for Boston multiple times and the IRONMAN World Championships six times. In 2023 and 2025, he guided Adrienne Bunn at the IRONMAN World Championship race in Kona, Hawaii.

If These Walls Could Talk” operates independently and exercises sole editorial discretion in all content decisions. While certain brands, products, or services referenced may have current or prior relationships with our affiliated marketing agency, such relationships do not influence our editorial content. We disclaim any liability for conflicts of interest, omissions, or outcomes arising from reliance on our content. All information is provided for general informational purposes only and should not be relied upon as professional or individualized advice.

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