TGS Technology: Training Aids ?️ By Anokh Jai Training aids come in all shapes and sizes. They range from the simplest alignment rods to complex swing training systems such as the K-Vest swing trainer system. The benefit of using training aids is that it provides visual, auditory and sensory feedback to the student when developing a specific motion or correcting a swing fault. As human beings, we respond better and develop changes faster when we can see or feel something.