Information and opinions on health from walker at HealthCentral.com. HealthCentral.com is one of the top health destinations on the Web, with more than 35 condition-specific, wellness and general health Web properties. http://www.healthcentral.com/profiles/c/996810/index http://www.healthcentral.com/profiles/c/996810/rss self application/xml en-us 15 120 19 http://www.healthcentral.com/images/hc_logo_sm.gif http://www.healthcentral.com/profiles/c/996810/index http://www.healthcentral.com/diet-exercise/c/996810/141580/walking Sat, 16 Jul 2011 13:14:20 -0400 walker starting a slow excercise routine.  I have been walking an hour a day.  My wife has knee issues, wants to ride bikes.  What is an equivalent of walking 1 hour verses bicycling?   http://www.healthcentral.com/diet-exercise/c/996810/141580/walking