What exercise can I do equivalent to riding my bike?

[k_hrdr]

I love riding my bike outside, but I only can about once a week. It's always too cold or raining and I really don't want to wait until summer. What is something I can do inside without equipment that would make me feel as refreshed as a good bike ride?

 

[juliexo73]

do something that you love just as much as riding a bike!