Only if you get it wrong.
Maybe you are not absorbing the impact with your legs correctly. Because bmx bikes have no suspension, you have to absorb the shock
It is not recommended, your feet can slip off the pedals and you can get hurt.
BMX
you spell it BMX
It is where bmx rider race.
Yes, Haro is a BMX brand. A great BMX brand, no less.
Strange question. What you need in order to be a BMX rider is to be able to ride a BMX. If you want to be a professional you need to be a very good rider. An education is always good to have. If you manage to become a pro it will help you understand what's in your contract. If you don't make it you'll have something to fall back on. If you get hurt, and have to quit riding, it'll also come in handy to know how to do something else.
Tricks done on a bmx bicycle .
Bmx is the same in German.
The standard BMX axle nut size for most BMX bikes is 3/8 inch.
The standard BMX hub spacing measurement for most modern BMX bikes is 110mm.
A freecoaster BMX is a type of BMX hub that allows the rider to coast backward without pedaling. This differs from a traditional BMX hub, which engages the pedals when the bike is moving backward.