The belief that faster running always means better training is flawed and often counterproductive. Slow runs are essential for building endurance, improving running economy, and preventing injuries. Prioritizing aerobic training strengthens the body’s efficiency, aids recovery, and reduces strain on joints and muscles. Overemphasizing speed can lead to burnout, overtraining, and plateaus. Elite runners like Eliud Kipchoge and Meb Keflezighi emphasize slower efforts to build sustainable fitness. By following principles like the 80/20 rule—80% easy runs, 20% speed work—you can train smarter, avoid injury, and achieve long-term success in running.