1. Until indicates the time of change of an activity or situation.
Pattern 1: verb + until + time
They waited until six o'clock.
The boys studied until midnight.
Pattern 2: verb + until + beginning of event
They lived here until their wedding; then they left.
She was busy until her graduation.
They didn't watch the game until halftime.
Wear Running Shoes
You probably want to wear running shoes when you do this since you will be pushing off with the sides of your feet and you need to have traction. This can also help to soften the blow each time that you land.