4. The Hundred

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This move isn’t super easy, but it’s really effective for getting the muscles deep in your stomach, which helps pull things in.

Start by lying on a mat with your arms at your sides.

Raise your legs to a 45-degree angle and raise your arms several inches off the mat.

Pump your hands 100 times, exhaling and inhaling in 5-second increments as you do so.

Think you can do it?

The Cobra
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