Orthodontic treatment is no reason to stop playing sport. Aligners do not get in the way of physical activity, and it is not recommended to take them out while you train. If your sport carries a risk of a blow to the face, it is advisable to wear a sports mouthguard. A blow to braces can damage them, bend the archwire and put unwanted pressure on the teeth. If this does happen, it is important to see your orthodontist so that they can check everything and make any corrections needed.
This answer is for general information. Your own case needs an examination by an orthodontist.