“When you do cardio moves that involve some level of instability, the core muscles turn on to protect the spine and prevent potential injury. Not only does that help support your spine, but it also provides big-time benefits for your entire core.” (Elizabeth Millard)READ MORE:Although some high-intensity group classes end with abdominal exercises like crunches, the fact is that whenever you challenge your stability, your core muscles activate.story by ELIZABETH MILLARD
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