Forget HIIT — this abs and deep core workout builds strength and stability in just 15 minutes

You don’t have to train at breakneck pace to power up your abs and core; keeping things slow and controlled will make your deep stabilizer muscles work harder.
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Forget planks — sculpt your abs and obliques with this 10-minute core workout

While planks are an effective move to include in your core sessions, you don't need them for a great abs workout. There are many other bodyweight exercises that are perfect for sculpting your abs and ...