Your height actually decreases during the day, not at night. The reference indicates that your height decreases by about 2/3 cm throughout the day. This is due to the compression of the cartilage in your spine from gravity. During the night, when you are lying down, the cartilage expands, and your height returns to its maximum. Therefore, height does not decrease at night, but actually increases.
| Time of Day | Height Change | Cause |
|---|---|---|
| Morning | Increase of 1 cm | Spinal cartilage expansion during sleep |
| Evening | Decrease of 2/3 cm | Spinal cartilage compression due to gravity |
In summary, while it might feel like you shrink overnight, the opposite is true according to the reference. You are actually taller in the morning. The decrease in height happens throughout the day as you go about your activities. The height loss of 2/3 cm occurs during the day because of gravitational pressure on your spine.
