Roller Derby is a physical and full contact sport that will leave you with bruises (or derby kisses as they are also known) so it's important to always hit safely in order to avoid injury.
Magic Beans from the London Rollergirls takes us through a step-by-step guide to the legal hitting zones and the importance of skating in a safe manner.
When hitting and blocking, you can only attack the below the neck and above the knees. If hitting an opponent from behind, you cannot directly target their back or within the bra straps.
However, you're completely allowed to hit with your bum!
What are you waiting for? Get your skates on and take a look at our guide to Roller Derby.