A detection system (1) of a method of performing a shooting exercise with a weapon (10) includes a weapon and at least one out of the weapon detector (100) and an item of clothing (30) having a physical state detector and/or motor detector (300). The system (1) includes a collection and storage unit (50) suitable for receiving and storing the information detected by the weapon detector (100) and/or by the physical state and/or motor detector (300).