The minutes are ticking down and she speeds up.
She's not sure why. Her intensity does nothing to pass the time more quickly. She could go twice as fast and only end up feeling more tired. In fact, she could slow down completely and would still have to endure for just as long.
It's in this moment that she realizes the same could be said about life. But faster in life tends to be more exciting than the treadmill so she carries on for practice.