Getting shorter throughout the day?

 i have noticed recently is when i wake up my height 179 cm then before i sleep i'm around 177 or 176.5 cm, after doing some research it seems most people lost maximum 1 cm height through daily activities, why do i lose 2+ cm? is there any way i could do to stop that or even better stay at the same height i'm at in the morning? 

It may be possible you may have posted in the wrong forum. 

i'm sorry, will you forgive me?