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Disclaimer: The dietary and other substances, and/or materials, equipment or devices discussed on this site may not have undergone evaluation and/or testing by the United States Food and Drug Administration or like agency of any other country. Risks that might be determined by such testing are unknown.
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The more valuable information you can learn from your outdoor exercise, the more motivated you'll be. Enter the Suunto X3 heart rate monitor, which not only serves as an informative and reliable training tool, but also adds an altimeter,...