[eggTimer]

Which martial arts or self-defense system would you recommend to be able to defend yourself effectively in an emergency? The classical martial arts take years to master and are often so complicated that in case of an emergency you are not well prepared due to lack of practice. 

For this reason Krav Maga is often used in the security sector, which consists of little technique but a lot of practice. Does anyone have any experience with it?

[garty1]

I did MMA in the past. I should start again, was really nice.

[Kötbullar1337]

Noor i def want to start tho

[Dslg01]

start with BJJ

[gobcarmicheal]

I would say any school that focuses on active/hands-on practice. Krav Maga, BJJ, Boxing, etc, even Ninjutsu. You also have to think about self-defense in the legal sense as you will have to understand how much force you can use under certain circumstances.