To move or fling one's body (used in expressions like 身を躍らす), implying a vigorous bodily movement or throwing oneself.
波が高く、彼は身を躍らせてボートに飛び乗った。
The waves were high; he flung himself and jumped onto the boat.
観客の歓声に促され、ダンサーは身を躍らせてステージに飛び出した。
Urged on by the audience's cheers, the dancer hurled himself onto the stage.
古い文語表現で『身を躍らす』という使い方が見られる。
You can find the literary/older expression '身を躍らす'.
To stir someone's feelings or cause excitement (as in 心を躍らす or 胸を躍らす), making the heart leap.
新しい仕事のオファーが届き、彼女は胸を躍らせた。
A job offer arrived and she felt her heart leap with excitement.
旅行の計画を聞いて、子供たちの心を躍らせた。
Hearing about the travel plans made the children's hearts leap with excitement.
そのニュースは多くのファンの心を躍らせた。
The news thrilled many fans.