I am trying to get more active, and heard about something called inline skates.  Do you know what those are?
I think they are those skates that were popular in the 90's with about 2 to 5 wheels in a straight line on the bottom of thhe skate.
Oh!  I wondered.  The only skating I have done is where you stepped into a skate with a shoe on, and you tightened the skate around your shoe.  
Yeah, inline skates are exclusively for inline skating.
It sounds harder.  More like trying to ice skate!
Yes it is very difficult. And a version of inline skates has been around since 1760.