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local UserInputService = game:GetService("UserInputService")
local character = script.Parent
local humanoid = character:FindFirstChildOfClass("Humanoid")

local WALK_SPEED = 16
local SPRINT_SPEED = 28
local sprinting = false

local function onInputBegan(input, gameProcessed)
if gameProcessed then return end
if input.KeyCode == Enum.KeyCode.LeftShift then
sprinting = true
if humanoid then
humanoid.WalkSpeed = SPRINT_SPEED
end
end
end

local function onInputEnded(input, gameProcessed)
if input.KeyCode == Enum.KeyCode.LeftShift then
sprinting = false
if humanoid then
humanoid.WalkSpeed = WALK_SPEED
end
end
end

UserInputService.InputBegan:Connect(onInputBegan)
UserInputService.InputEnded:Connect(onInputEnded)

-- Ensure walkspeed resets if script runs after character spawns
if humanoid then
humanoid.WalkSpeed = WALK_SPEED
end