INF STMIN

local Players = game:GetService("Players")
local UserInputService = game:GetService("UserInputService")

local player = Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")

humanoid:SetAttribute("Stamina", 1) -- 1 is full stamina
local normalWalkSpeed = 10
local runningWalkSpeed = 19.2

local function maintainFullStamina()
    while true do
        humanoid:SetAttribute("Stamina", 1)
        wait(0.1)
    end
end

local function toggleRun(isRunning)
     isRunning 
        humanoid.WalkSpeed = runningWalkSpeed
    
        humanoid.WalkSpeed = normalWalkSpeed
    


UserInputService.InputBegan:((input, gameProcessed)
     gameProcessed   
     input.KeyCode == .KeyCode.LeftShift  input.KeyCode == .KeyCode.ButtonL3 
        ()
    
)

UserInputService.InputEnded:((input, gameProcessed)
     gameProcessed   
     input.KeyCode == .KeyCode.LeftShift  input.KeyCode == .KeyCode.ButtonL3 
        ()
    
)

.(maintainFullStamina)