How can i make this script reduce stamina when sprinting?

Like the title asked.

UserInputService.InputBegan:connect(function(input, event)
	if event then return end
	if event then return end
	if input.KeyCode == Enum.KeyCode.W then
		if not start then
			start = tick()
		else
			if tick() - start < 0.2 then
				start = false
				if Running == false then
					print("Running")
					Running = true
					
					game.ReplicatedStorage.RemoteEvents.StartRunEvent:FireServer()
					current:Play()
					
					local RandomNumber = math.random(0, 1)
					if RandomNumber == 1 then
						Player.Data.AgilityEXP.Value = Player.Data.AgilityEXP.Value+math.random(5, 8)
						
					Player.Backpack.PlayerSetup.CombatSystem.Disabled = true
					
					end
				end
			else
				
				start = tick() --reset counter
			end
		end
	end		
end)

UserInputService.InputEnded:connect(function(input, event)
	if input.KeyCode ~= Enum.KeyCode.W then return end;
	if Running == true then
		print("Walking")
		Running = false
		game.ReplicatedStorage.RemoteEvents.StopRunEvent:FireServer()
		current:Stop()
		Player.Backpack.PlayerSetup.CombatSystem.Disabled = false
	end
end)

Is there also a way i can make it where a stamina bar goes down when the player is sprinting with this script?