Always start with a good and proper warmup regardless whether you are going into a badminton training or match.
This habit is essential for you to keep you away from unnecessary injuries due to not having a proper warm up.
By doing proper warm up, click it really helps you to prevent all those injuries, ask it helps you to stretch the muscle and joint, to increase your heart rate and flexibility when you play badminton. And not only that, it will also help to improve your performance and readiness on the court.
Stay healthy and happy always!