Just 1 second faster

The marathon or half marathon may be a long way and but your personal best can sometimes sound so much better if it 1 second faster. Spare a thought for Dathan Ritzenhein - his PB's are 2:10:00 for the marathon/ and 60:00 for the half marathon. (Imagine if they where 2:09:59 and 59:59)

**Notice The formula of double your half marathon time and add 10 mins equates to your full marathon time!