For beginners like me, the treadmill is a good start. By adjustable 8 Schierigkeitsgrade accompanied a treadmill even at increasing endurance. Not possible, or am I just too stupid, is hands-free running. Due to the sloping tread it drives a repeatedly backwards and there is a risk of the crash. Another drawback: The treadmill can during running, if you have a somewhat odd running style, move quickly to the side. Nice however, is the wide tread.
