Opinion about Contact Sports

I talked about Research paper and I said you can have multiple lesions practicing a sport of contact, but you win a lot of security, strong and health. It's not necessary fight, you can train and know the techniques for defend yourself. I learnt a lot of in this year practicing this sports, but I learnt respect and security, when you train in sports like this you understand a lot about respect and autcontrol. I was a bit nervous before train this sport but now I accept the problems more optimist and more relaxed. It's a bit difficult understand this mentality but it's incredible when you train and you surpass your friends who train with you.