My favourite is my Dog!! LOLOL. I have a exercise bike (great for impressing visitors!)
I gave away the stair master, treadmill plus ??? since husband passed away as I prefer to be outdoors in the fresh air. If I need exercise equipment, the community gym is less than a mile away.
I used one of those for the first week I was out of knee surgery. It was good, gives you the motion of a bike without the stress on your legs. After a week I was able to do a recumbent bike without the hand assist. I am sure this machine made that possible, sooner anyway.I recently used a Nu Step machine at PT and I love it.
The thing pictured below is what they call a "rebounder" at my PT. They make me stand on one foot and throw a ball back and forth with it. I know what you mean though, when you look up rebounder on Google you find both.Rebounder
You and me bro... you and me.