tag:blogger.com,1999:blog-6367396766053332258.post5575230713604983364..comments2023-05-17T00:13:38.844+10:00Comments on My futile pursuit of a last sub-3 hour marathon, 43 years after the first: LondonUnknownnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-6367396766053332258.post-5273717981061731832014-02-07T19:54:41.422+11:002014-02-07T19:54:41.422+11:00Although, it isn't lack of 'fitness', ...Although, it isn't lack of 'fitness', but instead, poor cardiac output, that is reducing your exercise capacity. Chin up, buttercup. All your oxidative enzyme levels in your peripheral muscles will stay up for a good while. You'll be OK when you get the AF sorted out.Jac's Mumhttps://www.blogger.com/profile/15020308226298936717noreply@blogger.com