What is Duddy Performance and why does it use QuickCoach?
TL;DR: Duddy Performance is a strength and conditioning facility in Sudbury, Massachusetts, run by Coach Liza Duddy. It coaches kids and adults in small groups and trains marathon, ultra, and HYROX athletes remotely. After briefly trying Trainerize, the team returned to QuickCoach, which Liza calls the best platform they have used.
Who she coaches
What kind of athletes does Duddy Performance train?
Duddy Performance trains kids and adults in small-group sessions plus endurance and event athletes preparing for marathons, ultras, and HYROX. Liza coaches many of them remotely, so one roster runs from youth strength work through to ultra-distance and hybrid-race prep.
The challenge
Why did Duddy Performance leave Trainerize?
Duddy Performance briefly moved to Trainerize and came back to QuickCoach fast. In Liza's words, the team "couldn't get off there soon enough." A roster spanning youth, adult, and endurance athletes needed a platform that stayed out of the way.
"We are a strength and conditioning facility in Sudbury, Massachusetts and we do small group personal training for kids and adults and we provide a lot of remote training for all of our athletes."Coach Liza Duddy
The switch
Can one platform handle strength, marathon, ultra, and HYROX coaching?
Yes. Duddy Performance runs strength and conditioning, marathon, ultra, and HYROX programming from a single QuickCoach roster. Liza builds each athlete's plan and delivers it to their phone, in-person clients and remote athletes side by side. She programs in the same place whether an athlete is chasing a first 5k or a HYROX finish, using strength and conditioning coaching software, endurance and hybrid coaching software, and small-group and squad coaching from one login. Coaches weighing the move often start by reading about Trainerize alternatives.
Over three years on the platform, Liza has built close to 55,000 exercises into her athletes' plans, and they complete 93.6% of what she assigns.
★★★★★ "QuickCoach is by far the best platform we've worked with." Coach Liza Duddy, Duddy Performance
What Liza loves about QuickCoach
- The best platform Duddy Performance has used, in her own words.
- One roster for every athlete, from kids to ultra-runners, in-person and remote.
- She came back fast after a brief switch to Trainerize.
- "I love QuickCoach and I hope it never, ever, ever, ever goes away."
Related
Story verified by the QuickCoach team, September 2026. Coach Liza Duddy consented to be featured. Figures marked "verified in QuickCoach" are pulled from Duddy Performance's workspace with consent.
HYROX is a registered trademark of HYROX GmbH. Duddy Performance and QuickCoach are not affiliated with or endorsed by HYROX GmbH.