Tommy Yim
I guess you can add some slope too. This will give you some extra challenges. For me, weight lifting is my favourite
This is probably the most classic gym equipment in the gym. But I like it because it's good for building stamina and good for cardio day. I like to set this up as a warm up first with walking slow about 5 mph. After that I gradually increase the speed and do a longer period of running with that speed. My gym has lots of treadmills and I guess it's good to watch something while you are running so you can do that too. What is your favorite equipment in the gym?