Coach Brett Klesitz

I am an endurance coach with a deep understanding of what it takes to pursue high-level performance while balancing real life. As a competitive athlete, I have Boston qualifying times for each of my marathons, with a personal best of 2:40:17, and have completed two Ironman races, earning a personal best of 9:47:17, both PB’s achieved after 40. These performances reflect years of disciplined training, smart planning, and a respect for long-term consistency.

Equally important to my athletic background is my life outside of sport. As a father of four young children, I understand firsthand the demands of career, family, and time constraints. My success has never come from unlimited training hours, but from efficient, intentional training that fits into a busy schedule. That perspective shapes my coaching philosophy.

My goal in coaching athletes is to maximize results through intelligent structure, individualized planning, and sustainable habits—because most athletes don’t have endless time, and they shouldn’t need it to improve. Whether your goal is qualifying for Boston, completing your first triathlon or first Ironman, or simply becoming faster and healthier without sacrificing family or work, I bring both elite-level experience and real-world practicality to every coaching relationship.

My approach blends proven endurance principles with flexibility, accountability, and a clear understanding that performance gains must coexist with life—not compete against it.