http://www.helium.com/knowledge/271970-why-training-for-a-marathon-can-motivate-you-to-work-on-your-fitness.xml Helium.com > Exercise Tips > Why training for a marathon can motivate you to work on your fitness en-us Copyright Helium.com Fri, 04 Sep 2009 05:07:08 GMT Fri, 04 Sep 2009 05:07:08 GMT