The key to prevention and reversal is education. The Alexander Technique teaches you how to undo bad habits that cause modern problems like text neck, carpal tunnel, and repetitive strain injury.
In learning the process of unraveling habitual patterns you allow under-used muscles to strengthen. Your natural coordination is better supported and you don't find yourself going down.
Instead of bringing yourself down, bring your phone or device up to you. This goes for other stimuli like microphones, keyboards, etc. Think up along the spine.
Let us not de-evolve back into apes! We were built move and to be upright.