Intervals intervals (Sand Dunes) 1:00:00 [3]
Sprints up a sand dune that was about 15 metres high and 50-60 degrees steep. had a 3 minute break in between each run while waiting for my turn on the sandboard. (we were sandboarding down the dune, i was using the hill climb back up as training)
my record time was 8.65 seconds.