💓Heart rate is a marker of metabolic and physiological processes, including fuel utilization.
🔥Optimizing fat burning is essential for endurance athletes, as it provides a steady source of fuel.
🌡️The 'fat max' zone, where fat burning is maximized, is a crucial training intensity to develop endurance.
📈Low-intensity training forms a significant portion of elite athletes' training programs to build aerobic capacity.
🧪Heart rate monitors allow for objective measurement and optimization of training intensity for optimal performance.