Humanoid.Running Script Isn't Working Correctly? [SOLVED]

[SOLVED BY MYSELF]

I want this script to detect when a player is moving, and give speed if they are. It was working at one point, and still is, just not all the time.

What I mean by this, is if my speed suddenly changes, it'll detect me moving, but if I'm moving at a relatively constant speed, it doesn't.

I've tried a lot of different things, and nothing is working. Here is the code, any help is appreciated.

game.Players.PlayerAdded:Connect(function(player)
	player:WaitForChild("leaderstats"):WaitForChild("Cardio")
	
	local Debounce = false
	
	local Speed = player.Speed
	local TotalSpeed = player.TotalSpeed
	local Cardio = player.leaderstats.Cardio
	local TotalCardio = player.TotalCardio
	local SpeedMulti = player.SpeedMulti
	

	local Char = game.Workspace:WaitForChild(player.Name)
	
	while true do
		Char.Humanoid.Running:Connect(function(speed)
			if Debounce == false and speed > 0 then
				print(speed)
				Debounce = true
				Speed.Value = Speed.Value + 1 * SpeedMulti.Value
				TotalSpeed.Value = TotalSpeed.Value + 1 * SpeedMulti.Value
				Cardio.Value = Cardio.Value + 1 * SpeedMulti.Value
				TotalCardio.Value = TotalCardio.Value + 1 * SpeedMulti.Value
			end
		end)
		
		wait(1)
		Debounce = false
	end
end)

Edit: The print(speed) also doesn't print.

And once again, I ended up solving it myself... Maybe I should just never ask a question. But anyways, here's what I did to make it work:

game.Players.PlayerAdded:Connect(function(player)
	player:WaitForChild("leaderstats"):WaitForChild("Cardio")
	
	local Speed = player.Speed
	local TotalSpeed = player.TotalSpeed
	local Cardio = player.leaderstats.Cardio
	local TotalCardio = player.TotalCardio
	local SpeedMulti = player.SpeedMulti
	

	local Char = game.Workspace:WaitForChild(player.Name)
	
	local runSpeed
	Char.Humanoid.Running:Connect(function(speed)
		runSpeed = speed
	end)
	
	while true do
		wait(1)
		
		if runSpeed == nil then
		elseif runSpeed > 0 then
			Speed.Value = Speed.Value + 1 * SpeedMulti.Value
			TotalSpeed.Value = TotalSpeed.Value + 1 * SpeedMulti.Value
			Cardio.Value = Cardio.Value + 1 * SpeedMulti.Value
			TotalCardio.Value = TotalCardio.Value + 1 * SpeedMulti.Value
		end
	end
end)