Athletics Ontario Running Podcast
Athletics Ontario Running Podcast
John Shep
EP 234: Dr. Danny Grossi - From Patient to Pioneer of PIRX
41 minutes Posted Jul 23, 2026 at 8:49 am.
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Show notes

In this deeply moving episode of the Athletics Ontario Running Podcast, we sit down with physician and competitive runner Danny Grossi to hear a story of unimaginable resilience and innovation.

After a stellar collegiate career at Princeton, a sudden medical condition sidelined Danny for decades. His triumphant return to the sport in his 50s was abruptly halted by a life-threatening blood clot and severe compartment syndrome. Facing multiple intense surgeries, doctors delivered a grim warning that he might never walk again, let alone race.

Refusing to accept this fate, Danny leveraged his extensive medical expertise and a rigorously data-driven mindset to engineer a grueling but successful rehabilitation process. This harrowing journey sparked a powerful new mission, leading him to develop PIRX, a cutting-edge, AI-powered training app designed to predict race performance and optimize physiological outcomes.

Tune in to discover how one athlete transformed the terrifying threat of limb loss into a technological breakthrough dedicated to helping runners everywhere reach their ultimate potential.

Learn more about Danny and PIRX at: https://www.instagram.com/pirx.app/

Register to be an Athletics Ontario member: https://athleticsreg.ca/#!/memberships/athletics-canada-road-trail-membership

Check out Hammer Nutrition Canada (and use our special discount code AORP15 at checkout): https://hammernutrition.ca/