Here’s a bit of good news, if this is your second marathon you can almost be guaranteed to knock 5-10% off of the time of your first one based on experience alone. The longer you are on your feet, the more variables come into play. Therefore, expect to deal with twice the amount of ambiguity as the half-marathon.
Although not the most scientifically-validated approach, Yasso 800’s have been the go-to marathon race pace prediction workout for years and years. To perform a Yasso 800, take your expected marathon pace in hours and minutes and convert it to minutes and seconds.
For example, if your goal pace is three hours and forty-five minutes your 800 time would be three minutes and forty-five seconds. To begin, you will perform three to four repetitions at this pace with an equivalent recovery period.
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