isometric exercise
C2CEFR level
75/100Rarity: rare
TechnicalRegister
A muscle-strengthening exercise in which tension is generated without any change in muscle length or visible joint movement.
While the knee was too painful to bend, we began with isometric quad sets to maintain muscle activation.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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