A physical therapist explains how a modified side plank with a clamshell strengthens runners’ core and hips to improve efficiency and reduce injury risk.
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This simple plank variation 'supercharged' my core strength and full-body stability - here's how to do it
Fitness fads may come and go, but there’s one aspect of strength training we can all agree on: a strong core never goes out of style - and for this, I'd recommend the side plank exercise every time.
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