This episode takes you inside one of the most ambitious equine-athlete research projects in the sport, as leading veterinary clinician Dr. Cris Navas and five-star rider Jennie Brannigan unpack six years of groundbreaking work on arrhythmias, fitness tracking and performance monitoring. From the heart-rate data that reshapes conditioning plans to the real-world decisions it informs at the top level, they reveal how science and horsemanship meet to keep event horses healthier, sounder and competitive for longer. It is a rare, behind-the-scenes look at how numbers can calibrate feel, guide welfare-driven training, and give riders the confidence to make better calls for the horses they know best. Plus, Will Coleman drops in with his own perspective from inside the program.