Don't be ridiculous. Ed Whitlock ran that pace for an entire marathon at the age of 73. If you're dedicated, under 50, free of serious ailments and anywhere ne

Don't be ridiculous. Ed Whitlock ran that pace for an entire marathon at the age of 73. If you're dedicated, under 50, free of serious ailments and anywhere near the weight range this thread used as an example, it's something you can almost definitely achieve for a single hour.