isometrics
/ˌaɪsəˈmɛtrɪks/
noun
- A system of physical exercises in which muscles are tensed against each other or against an immovable object, without changing length.
- She does isometrics every morning to strengthen her core without any equipment.
- Many athletes include isometrics in their training to improve stability.
- Isometrics can help build muscle endurance by holding a position for several seconds.