core strength

British  

noun

1. the strength of the underlying muscles of the torso, which help determine posture

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Example Sentences

"When you think he should be on the defensive, he's able to use that core strength and come back on the offensive."

From BBC

There are many examples of mums returning to the top of their sports but this is not the case in gymnastics, where pelvic floor and core strength - both weakened during pregnancy - are so vital.

From BBC

They usually go back together within two months, but as a gymnast Kinsella is having to work hard to regain that core strength to get back on the apparatus.

From BBC

But I am not alone in my strange, completely out-of-character turn toward lifting weights and working on core strength.

From The Wall Street Journal

Still, “Good Boy” doesn’t stray too far from the film’s core strength: a normal dog doing normal dog things.

From Los Angeles Times