A 15 minute obliques side abs workout designed for a stronger core and toned abs, using only a yoga mat and a block at home.

So, while it's still important to have a well-rounded core routine (more on that below), the TikTok-ers are onto something: “If you want added definition on your abdominals, [cable] crunches are good, ...

Train your core in the way it actually moves ...

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