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I'm a Pilates instructor - this 15-minute workout strengthens the core without a single sit-up

Sit-up and crunches be gone - just 15 minutes of Pilates can build up core strength, and improve mobility and flexibility ...
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No sit-ups here - a Pilates instructor recommends this 15-minute workout to strengthen your core without a single one

You don't need to spend hours breaking a sweat to get into shape, and you certainly don't need to do sit-ups to improve your core strength. A simple 15-minute Pilates workout will do. It's an ...