When most people think about strength training, they think about muscles. Bigger muscles. Stronger muscles. More defined muscles. But there's another system working behind the scenes every time you lift a weight, sprint, jump, balance, or perform a new exercise: Your nervous system. Your nervous system plays a critical role in how your body moves, produces force, coordinates movement, and adapts to training. Understanding how it works can help explain why you can become stron

When most people hear the word cardio, they probably picture a treadmill, elliptical, stationary bike, or a long run. When they hear conditioning, they may picture an athlete doing sprints, sled pushes, or a brutal circuit. The terms are often used interchangeably, but cardio and conditioning aren't necessarily the same thing. Both are important. Both can improve fitness. But they serve slightly different purposes—and understanding the difference can help you build a more eff