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A back spasm happens when the muscles in your back contract involuntarily, causing pain, stiffness, and tightness. They can happen as a result of straining certain muscle groups, muscle weakness or ...
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Fit&Well on MSNChris Hemsworth swears by something called Foundation Training to keep back injuries at bay—here's how to master one of its core movementsMy recent conversation with Chris Hemsworth's long-time trainer and friend Luke Zocchi was different. Zocchi told me how ...
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