jumping jack

US /ˈdʒʌmpɪŋ dʒæk/
UK /ˈdʒʌmpɪŋ dʒæk/
"jumping jack" picture
1.

pajacyk

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

:
We started our workout with 20 jumping jacks.
Rozpoczęliśmy nasz trening od 20 pajacyków.
Doing jumping jacks is a good way to warm up.
Robienie pajacyków to dobry sposób na rozgrzewkę.