9 / YASSO 800S

Runner's World (UK) - - Training -

WHY In­vented by Bart Yasso from Run­ner’s World US: take your goal marathon time and then try to run that time over 800m – us­ing min­utes and sec­onds rather than hours and min­utes.

HOW If your aim is a four-hour marathon, your Yasso goal time is four min­utes. Ear­lier in your sched­ule, start with six reps at your goal time, with a re­cov­ery time equal to the rep (in this case, four min­utes). Re­peat the work­out reg­u­larly and add reps, up to a max­i­mum of 10, a few weeks out from your race.

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