Race Comment Explainer

Original comment with matches highlighted:

tracked leaders, out, headed to lead over 1f out, headed inside final ,

Matched phrases & meanings

Phrase	Meaning
headed inside final	The horse lost the lead very late, within the last
Tracked leader	Followed closely behind the leaders.
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.
Furlong	Unit of distance; one furlong is 1/8 of a mile (approx. 200 meters).

Summary

The horse lost the lead very late, within the last
Followed closely behind the leaders.
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.
Unit of distance; one furlong is 1/8 of a mile (approx. 200 meters).