noun
A direct loanword used in contexts such as fitness, psychology, or business to refer to physical or mental strength, often as a positive attribute.
彼のストレングスは、どんな状況でも冷静でいられることだ。
His strength is that he can stay calm in any situation.
このトレーニングは体幹のストレングスを高める。
This training improves core strength.