leadingmuscle
nounUK /ˈliːdɪŋ ˈmʌsəl/
US /ˈliːdɪŋ ˈmʌsəl/
The leading muscle is the main muscle that pulls to make a body part move.
In your arm, the biceps is the leading muscle when you lift something.
RELATED WORDS
OTHER MEANINGS
2. The muscle that starts a movement first in a group of muscles.
The leading muscle fires before the helper muscles join in.
3. A muscle that guides or directs a motion during exercise.
Your hip's leading muscle controls the direction of your kick.
4. The strongest muscle involved in a particular action.
For jumping, the leading muscle in your leg does most of the work.