:runner:The Yasso 800 workout involves running 10 sets of 800 meters at the same pace as your goal marathon time.
:stopwatch:The workout helps runners gauge their marathon fitness level based on how well they complete the 800-meter intervals.
:muscle:Consistency in hitting the target time for each interval is a good indication of being on track for achieving the marathon goal.
:heart:Monitoring heart rate during the workout can provide valuable insights into fitness level and effort exerted during each interval.
:checkered_flag:Achieving the target pace or faster in the Yasso 800 workout suggests the potential to run a marathon at a similar pace.