We can infer from the passage that ……………..

In-line skating is a great way to burn calories and build
muscle tone, but as known very well it's too difficult to
stop. Now a company is introducing a new line of
skates that, it says, will give beginners .an easy way to
brake and advanced skaters better speed control on
hills. The system is activated by simply moving the
braking skate slightly forward with all four wheels on
the ground. This applies rear pressure on the cuff of
the skate and causes the braking device to
automatically lower and" make contact with the ground.
Since skaters don't have to lift their toe up to brake, the
user can brake in a more natural position, says the
company.