Z1 a Z5: qué pasa en tu cuerpo cuando subes la intensidad (sistemas energéticos y cerebro)

When you train in Zones 1, 2, 3, 4, or 5, you're not just changing your pace: you're forcing your body to completely reorganize its energy systems, and today I'm going to explain how and why this happens. In this video, I'll explain what actually happens in your body when you move from Zone 1 to Zone 5, how your energy systems change, and why your brain acts as the CPU that regulates your effort. We're not talking about isolated theories or fads. We're talking about physiology applied to training, explained as a progressive journey from rest to maximum intensity. Throughout this video, you will understand: ✔️ Which energy system predominates in Zones 1 and 2 ✔️ What happens during the metabolic transition from Zone 2 to Zone 3 ✔️ Why lactate isn't the enemy ✔️ What actually changes in Zones 4 and 5 ✔️ How the brain regulates intensity and fatigue ✔️ Why always training in intermediate zones hinders your progress This approach is based on modern exercise physiology, neuroregulation of effort, and current scientific evidence, applied to both endurance and strength training. I'm Alan Roca, a holistic physician, sports training expert, and specialist in the psychology of physical activity and sport. For over two decades, I've been helping athletes train intelligently, understanding their bodies instead of fighting against them. 📘 My book, Soul and Wheels, is available on Amazon and MercadoLibre. In it, I delve into training, physiology, and resilience applied to sports. 🌐 At alanroca.com, you can download the free ebook "The Mind Wins First," about the psychology of effort and performance. 🎓 In the coming days, we will launch the "Training with Science" course, where you will learn to plan, interpret training zones, and train based on real physiological data. If you want to train better, understand your training zones, and stop making common mistakes, this video is for you. Thank you for being here and for continuing your learning. #TrainingZones #Z1Z2Z3Z4Z5 #ExercisePhysiology #TrainingWithScience #EnergySystems #Lactate #Zone2 #SportsPerformance #AlanRoca