Especially in those sports or training sessions focused on the upper body, it is vitally important that the shirt chosen allows for all types of movement, without limiting the range of motion or causing discomfort.
The fabric of gym T-shirts is ideal for not causing discomfort, such as chafing, wounds, cutting off circulation, leaving marks, etc. In addition, they are not easily torn, so that each garment can last longer than other T-shirts.