In Krav Maga, there are no hard-and-fast rules. It is not a sport, and there are no competitions. All the techniques focus on maximum efficiency in real-life conditions. Krav Maga generally assumes a no quarter situation; the attacks and defences are intended to inflict the most pain possible on the opponent. Groin strikes, headbutts, and other efficient and potentially brutal attacks are emphasised.
The guiding principles for those performing Krav Maga techniques are:
Neutralise the threat
Go from defending to attacking as quickly as possible
Use the body’s natural reflexes
Strike at any vulnerable point
Use any tool or object nearby
The basic idea is to first deal with the immediate threat and then neutralise the attacker, executing the technique in a straightforward manner, despite the rush of adrenaline that is common under such circumstances. The emphasis is on taking the initiative from the attacker as soon as possible.