A simple toy demonstrates the effect of lifting posture on our back. Your back will thank you! Transcribed audio: I've got to make sure it's all set up. How could you do it? Ouch. Ouch. I've been broken.
When you're falling asleep and suddenly your body violently jerks awake like you just fell off a cliff, scientists call it a hypnic jerk, and it happens because your brain thinks you're dying. As you drift off, your muscles relax so fast that your primitive brain stem misinterprets it as falling because your heart rate drops fast and your breathin [truncated]
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