What REALLY Happens to Your Muscles When You Lift Weights? (Science Explained)

What actually happens inside your muscles when you lift weights? Every rep triggers a chain of events involving your nervous system, mechanical tension, muscle protein synthesis, and recovery. But how does that process actually make your muscles bigger and stronger? In this episode of The Performance Lab, we break down the science of muscle growth and explain what really matters when it comes to building muscle. 🔬 In this video: How your brain activates your muscles Mechanical tension and hypertrophy explained Muscle protein synthesis and protein intake Why sleep and recovery matter Progressive overload and common muscle-building myths Whether you're new to lifting or have years of experience in the gym, understanding the science can help you train more effectively. Subscribe to The Performance Lab for evidence-based fitness science, exercise physiology, and human performance. The Performance Lab The Science Behind a Stronger You. #MuscleGrowth #Hypertrophy #FitnessScience