Ushiro-geri, or back kick, is a fundamental technique in martial arts known for its effectiveness and versatility. It is notable for its low knee chamber after the initial turn, which involves slight pivoting of the body to position the kicking leg properly. This precise movement allows the practitioner to deliver a powerful kick at close range, targeting under the opponent's guard by exploiting openings that are difficult to defend against. The maneuver requires proper balance, timing, and control to maximize impact and ensure safety.