Race Comment Explainer

Original comment with matches highlighted:

chased leaders, ridden along rounding weakened, no impression and from 4 out

Matched phrases & meanings

Phrase	Meaning
Chased leaders	Running directly behind the horses in front of the field.
home turn	This is the final bend or corner of the track, just before the horses enter the final straight run to the finish line.
Weakened	The horse lost speed and dropped back through the field.

Summary

Running directly behind the horses in front of the field.
This is the final bend or corner of the track, just before the horses enter the final straight run to the finish line.
The horse lost speed and dropped back through the field.