Exercise is relative, even if you stay in bed all day.

Motion is relative. Even if you stay in bed all day, you are constantly moving relative to other celestial bodies in the universe. This short video vividly shows you lying in bed, how fast you are moving relative to different celestial bodies. The order from top to bottom is: the rotation of the earth, the rotation of the earth around the sun, the rotation of the sun around the Milky Way, and the movement of the Milky Way relative to the cosmic microwave background. It’s so fast. No wonder it’s a little dizzy.Video Source: Dr James O’DonoghueSteed’s Weibo Video of the Neck