Meaning of the word "jumping jack" in English

What does "jumping jack" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

jumping jack

US /ˈdʒʌmpɪŋ dʒæk/
UK /ˈdʒʌmpɪŋ dʒæk/
"jumping jack" picture

Noun

1.

an exercise in which you stand with your feet together and your arms at your sides, then jump to a position with your legs spread wide and your arms extended overhead, and then return to the starting position

Example:
We started our workout with 20 jumping jacks.
Doing jumping jacks is a good way to warm up.
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