Race Comment Explainer

Original comment with matches highlighted:

slowly into stride and pushed along in invo, never going pace to get involved

Matched phrases & meanings

Phrase	Meaning
never going pace to get involved	The definitive statement that the horse's speed/turn of foot was insufficient, or it was positioned too far back, to catch the front-runners and seriously challenge for a winning position.
Pushed along	The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Rear	Running near the back of the field.

Summary

The definitive statement that the horse's speed/turn of foot was insufficient, or it was positioned too far back, to catch the front-runners and seriously challenge for a winning position.
The jockey started to urge the horse (hand-riding, not necessarily using the whip).
Running near the back of the field.