Race Comment Explainer

Original comment with matches highlighted:

held up in over, took ion hold, pushed along over 2f out, mpression final , no impression

Matched phrases & meanings

Phrase	Meaning
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Plugged on	Kept going without showing much pace.
Held up	Intentionally raced patiently at the back to save energy.
Furlong	Unit of distance; one furlong is 1/8 of a mile (approx. 200 meters).
Rear	Running near the back of the field.
Keen	The horse was fighting the jockey, wasting energy early.

Summary

The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Kept going without showing much pace.
Intentionally raced patiently at the back to save energy.
Unit of distance; one furlong is 1/8 of a mile (approx. 200 meters).
Running near the back of the field.
The horse was fighting the jockey, wasting energy early.