Sentence:  In a study of horses during a <WSD>puissance</WSD> competition that started at a height of 1.80 m and ended in the last round at 2.27 m, success was significantly positively correlated with the following variables at lift-off: vertical velocity of CM, height of CM, distance of CM from the fence; and was significantly negatively correlated with the distance of the leading hind limb to the CM. 
Meaning of the word marked with <WSD> tags:  "Often" Puissance: the high-jump component of the sport of show jumping.