if you got to run, no need treadmill.. just run..
if you need weights, go get a couple bags of rice.. instant
dumbbells..
if you need... what else would you need?
gym? need gym meh?
Errm...it depends on what you are trying to do in the gym
really.
threadmill's advantage is that its indoors, not subject to
inclement weather, less wear and tear on the knees...and good for
those who want to hit the weights either before or after their runs
(crosstraining)
bags of rice....bad idea. might even be dangerous. I'm not
even going to go there.
actually there are some really good exercises you can do for
your back in there, using equipment that supports/takes the stress
of your spine while you exercise the muscles that support the spine
in isolation. I could go on and on, but you get the general
idea.
of course, there are gyms with all this gear but cost a lot less
than california fitness