According to the website, Underground Health Reporter, we are taller in the morning than in the evening because during normal activities in the day the cartilage in our knees and other areas slowly compresses, but when we go to sleep and rest the cartilage goes back to normal
When you sleep, our spine is no longer subjected to the pressures of gravity, and our body is able to replenish lost fluids between your intervertebral discs. The excess fluid provides up to a half inch more of height upon waking.
