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miro_o
@miro_o @Lémonsqueezer if you are watching your speed on some cheapo cycle computer or better yet guessing your speed while using a stopwatch or cycling one handed with a pocketwatch or just guessing how long 30 seconds is then your numbers will get out of wack fast.
You also get a very isolated section of your ride that you are all pumped up for recording so the result you get is higher(as you want to be the best lol) or you feel distracted by all the counting, riding one handed and junk and ride slower to be safer as you still need to pay attention to the road somewhat and results are lower.
You could get another rider on a group ride to count a few times cycling behind you without warning, after a while when you forget and are riding like normal they just go "hey I did the count on that last bit, 18mph and 40/30sec".
tl:dr #badscience