The rigorous training program and the increased personal risk in combat require high motivation and the ability to learn a variety of skills. Aspiring snipers must have an excellent personal record. The sniper trainee must be an expert marksman. Repeated annual qualification as expert is necessary. The sniper, often employed in extended operations with little sleep, food, or water, must be in outstanding physical condition.
Good health means better reflexes, better muscular control, and greater stamina.
The self-confidence and control that come from athletics, especially team sports, are definite assets to a sniper trainee. Eyesight is the sniper's prime tool. However, wearing glasses could become a liability if glasses are lost or damaged. Color blindness is also considered a liability to the sniper, due to his inability to detect concealed targets that blend in with the natural surroundings. The sniper should not be a smoker or use smokeless tobacco.