"According to a new study, Botox injections can help back pain. So you see, that's why John Kerry had all that Botox - his back was killing him from all that flip-flopping on issues."

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When you elevate the heels more so than you elevate the sole of the foot, you trigger a cascade of compensations in the knees and hips that cause tight hip flexors, and then those hip flexors cause lower-back pain.

— Tim Ferriss