Our Journey in Cardio Excellence
From a small clinic vision to transforming how CrossFit athletes approach cardiovascular training—discover the story behind Zenira's mission.
Founded with a Clear Vision
Dr. Sarah Chen and Maria Rodriguez met at a sports medicine conference in Denver. Both had noticed the same troubling pattern—CrossFit athletes were burning out from poor cardiovascular training approaches. Sarah brought her cardiology expertise, while Maria contributed her experience as a former Olympic weightlifter. Together, they launched Zenira from a small clinic in New Jersey, focusing on evidence-based cardio protocols specifically designed for high-intensity functional fitness.
Research Recognition & Growth
Our breakthrough study on heart rate variability in CrossFit training gained international attention in the Journal of Sports Cardiology. This research validated what we'd been seeing clinically—traditional cardio approaches were actually hindering CrossFit performance. We expanded our team to include specialized exercise physiologists and launched our first comprehensive training programs. By the end of 2021, we were working with over 200 athletes across the East Coast.
Leading the Revolution
Today, Zenira has transformed the cardiovascular training landscape for thousands of CrossFit athletes. Our proprietary heart rate monitoring protocols and personalized training systems have become the gold standard in competitive CrossFit. We're not stopping here—our 2025 initiatives include expanding into nutrition optimization and launching our certification program for coaches worldwide. The future of cardio training in functional fitness starts here.
Born from Real Experience
Every protocol we develop comes from real athletes facing real challenges. We've seen too many talented CrossFitters plateau or burn out because they were following cardio advice designed for marathon runners. Our approach is different—we study the unique demands of constantly varied, high-intensity movement and create cardiovascular training that actually supports this style of fitness rather than fighting against it.
The Hearts Behind the Science
Meet the experts who've dedicated their careers to revolutionizing how we think about cardio in CrossFit.
Dr. Sarah Chen
Founder & Chief Medical Officer
Board-certified cardiologist with 15 years of experience in sports medicine. Sarah's research on cardiac adaptation in high-intensity training has been published in over 40 peer-reviewed journals. She's also a competitive CrossFit athlete who understands the demands firsthand.
Maria Rodriguez
Co-Founder & Performance Director
Former Olympic weightlifter turned exercise physiologist. Maria brings real-world athletic experience to our scientific approach. She's coached over 500 athletes and developed the periodization models that form the foundation of our training systems.
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