Race Comment Explainer

Original comment with matches highlighted:

midfield, pushed along over 1f out, soon short of room and

Matched phrases & meanings

Phrase	Meaning
Short of room	Blocked or crowded by other horses, unable to make progress.
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Weakened	The horse lost speed and dropped back through the field.

Summary

Blocked or crowded by other horses, unable to make progress.
The jockey started to urge the horse (hand-riding, not necessarily using the whip).
The horse lost speed and dropped back through the field.