Sometimes, it is practical to have a basic gym equipment at home like the treadmills, ellipticals or spinner for people like me that have to juggle between kids, home, work and exercise.  Having a bicycle (real ones) is not a bad idea, but getting injuries from cycling is high especially with the traffic and crime rates. I rather use the spinner at the comfort of home while babysitting.  Not bad of killing two birds with a stone huh.