Race Comment Explainer

Original comment with matches highlighted:

held up in kept, hit 8th, pushed along 4 out, n on on, left in 2nd 2 out,

Matched phrases & meanings

Phrase	Meaning
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
One pace	The horse maintained its speed but could not accelerate or quicken.
Kept on	The horse maintained its speed well to the finish.
Held up	Intentionally raced patiently at the back to save energy.
Ran on	The horse maintained or increased its speed in the final stages.
Rear	Running near the back of the field.

Summary

The jockey started to urge the horse (hand-riding, not necessarily using the whip).
The horse maintained its speed but could not accelerate or quicken.
The horse maintained its speed well to the finish.
Intentionally raced patiently at the back to save energy.
The horse maintained or increased its speed in the final stages.
Running near the back of the field.