coremuscle
nounUK /ˈkɔːˌmʌs.əl/
US /ˈkɔːrˌmʌs.əl/
A strong muscle in the middle of your body that helps you stand and move.
Doing planks makes your coremuscle stronger.
OTHER MEANINGS
2. A muscle group that keeps your spine steady during movement.
Runners rely on their coremuscle for balance.
3. The central muscles of the torso, including the belly and lower back.
Yoga poses work the whole coremuscle area.
4. A key muscle that supports good posture while sitting.
Sitting up straight uses your coremuscle.