Gravity Zones, Gravity of the player?

I'm trying to make a ragdoll game. And I'm having trouble with gravity zones. I'm trying to make a zone where you have higher gravity ( Like when you go into the zone gravity change so you just float for a while - https://ctrlv.link/CQqF ). I searched on YT, I searched everywhere but I can't find anything. Please help.

(sorry for my broken English I hope everyone understands me)