Here’s one of my most popular videos from my YouTube channel. I’ve been using and teaching this basic test for many years and I still find it a reliable indicator of overall core strength and stability.
And the unique thing about it is that not only is it a test, it’s also a great training protocol for developing your core strength and stability over time.
Don’t worry about completing the whole test at first, I’d rather you stick to good form. You’ll feel your muscles shaking as you reach your limit of core activation, so go at your own pace and let each session build on the last until you can finally pass the test.