Check out the transcript of a message board discussion with Weather Expert, Ingrid Amberger. Dr. Jeffrey Masters, Director of Meteorology for the Weather Underground Web site, answered student weather and winter storm questions in the winter of 2001. Dr. Masters received his B.S. and M.S. degrees in Meteorology from the University of Michigan.
It is easier on the joints than running. It is non-impact and therefore safer and easier on the joints. Biking is an exercise that you can do even at an older age. It is a great aerobic exercise for losing weight and increasing cardio endurance.
The core muscles also power your turns and help you control the bike. While the cycling position does strengthen your core muscles, additional core exercises will increase your core's endurance and power, leading to improvements during your rides. The glute bridge, front plank and mountain climbers are examples of exercises that strengthen the core muscles.