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exercise - Difficult to keep legs up during double lying leg raise - Physical Fitness Stack Exchange
DUR1 Health - Straight leg raise vs. bent knee leg raise. Which one is more effective when working on your abs? With straight leg raise, as you're raising your legs, the muscles
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Muscles of the leg and foot: medial side view, with knee bent and foot flexed. Ink and watercolour, 18--. | Wellcome Collection
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