Script for the LocalScript: local userInput = game:GetService("UserInputService") local players = game:GetService("Players") local sprintSpeed = 30 local walkSpeed = 16 local player = players.LocalPlayer local function beginSprint(input, gameProcessed) if not gameProcessed then if input.UserInputType == Enum.UserInputType.Keyboard then local keycode = input.KeyCode if keycode == Enum.KeyCode.LeftShift then player.Character.Humanoid.WalkSpeed = sprintSpeed end end end end local function endSprint(input, gameProcessed) if not gameProcessed then if input.UserInputType == Enum.UserInputType.Keyboard then local keycode = input.KeyCode if keycode == Enum.KeyCode.LeftShift then player.Character.Humanoid.WalkSpeed = walkSpeed end end