Had teh same problem in skyrim, atleast that got solved by a mod, but no fallout 4 mod for it yet. Im nost sure if theres a command i can enter into teh console to disable this, because for now i cant sprint. Everytime i do, i feel like im goign to throw up, the motion sickness from it is aweful, specially when im in the power suit. I dont understand why devs put this into games, thats not even remotly what it looks like in real life. When we bob aroudn in the real world, our brain compensates, and keeps everythign level, sure maybe we start to see movement like in the game if were falling down a hill, but not sprinting.