Complex training is a type of exercise where you do two different types of exercises in a row. Let's say you start by doing a heavy weightlifting exercise, like squats or deadlifts. Then, without taking a break, you switch over to a lighter exercise, like jumps or lunges.
Now, the reason this is called "complex" training is because it's a combination of both heavy and light exercises. It's like having a really big meal with different kinds of food. By mixing up your exercises, you can get more benefits than doing just one type of exercise.
So, why do we mix it up? Because complex training can help you become stronger and more explosive. The heavy exercise helps to build your strength and power while the lighter exercise helps to train your muscles to move fast and explosively. It's like training your body to be strong and quick at the same time.
But, it's important to remember that complex training can be very intense and challenging. You need to make sure to warm up properly and use proper form to avoid getting hurt. And, if you're just starting out, it's best to work with a trainer or coach who can help you with the right exercises and techniques.