1)The craze started in America.
2)It was started for Canadian ice hockey players who wanted to train during the summer.
3)The blades were chanced for four wheels because the hot sun melted the rivers and the lakes where skaters use to practic.
4)The roller blading advantages are:you can smooth turn and you have more agility than on ice
5)The roller blades can go to 30 mph(miles per hour).
6)Protective equipment consist in helmet,knee and elbow pads and special wrist bands.
7)Anyone can use line roller skates
