Weightlifting kirstion

[VikingPower]

This is what I meant by Bao being correct:

You don't get rapid strength gain from isolation.

[Dochter]

That isn't specific enough to be correct.

It really is moot, we're all just being particular.

[Equipoise]

Isometric contractions are used for that reason. It focuses on strengthening and isolation of a specific muscle. It doesn't make your core lift any stronger though as it doesn't help strengthen the stabilizing muscles and tendons associated with core lifts.