Honestly, it depends on what you accept them for. Some people take preliminary training, thinking that it will make them bigger, stronger or faster. It probably won't, but it will certainly help you crush an important workout. And if you crush a lot of workouts, over time it can definitely help you get bigger, stronger and faster!
Remember that the main purpose of training is not direct muscle building, but the improvement of your body, it is to give you energy, endurance and focus on doing exercises that will help you achieve both of these goals.
There are many studies that show that most of the individual ingredients in the most popular modern workouts provide some benefit in strength, endurance, or muscle growth. But the history of training and training of these subjects may differ significantly from yours.
Short answer: Yes, preliminary training can help you improve your training. But the truth is that this is just one factor of many. Get your education right. Build your nutritional foundation. Optimize your recovery with plenty of sleep. And then use add-ons to help you crush the last 5 percent of the project!