Hexagram 52, Gèn (Keeping Still): Line 3
艮卦九三 · 艮为山 · 中文版
九三：艮其限，列其夤，厉熏心。
The line (Legge)
The third NINE, undivided, shows its subject keeping his loins at rest, and separating the ribs (from the body below). The situation is perilous, and the heart glows with suppressed excitement.
Small Image commentary
'He keeps the loins at rest:' - the danger (from his doing so) produces a glowing, heat in the heart.
象曰：艮其限，危薰心也。
In plain words
Keeping the waist still, tearing the flesh along the back: danger smoulders in the heart. The third line sits between the upper and lower parts and forces itself to a stop, splitting them apart. The Small Image says danger scorches the heart.
Applying it to your situation
If you are forcing yourself to a sudden halt, this line suggests that suppressing things hard can hurt you. Is there a gentler way to slow yourself down?
Position
A solid (yang) line in the third place, which is a yang (odd) place, so it is in its proper place. Its partner is line 6; both are yang, so they do not respond.
If this line moves
With this line moving alone, Gèn changes into Hexagram 23 Bō (Splitting Apart). The Jiaoshi Yilin verse for this change (Chinese): 焦氏易林·艮之剥.
The hexagram
Hexagram 52 Gèn (Keeping Still). The Judgment: When one's resting is like that of the back, and he loses all consciousness of self; when he walks in his courtyard, and does not see any (of the persons) in it,--there will be no error.
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English text: James Legge, The Yi King (Sacred Books of the East, vol. 16, 1882), public domain, as transcribed by the Chinese Text Project. Chinese: the received text. Offered for study and reflection, not as prediction. Plain-English readings and position notes by this site.