Bill Gates
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- West Sussex
jimboalee said:The chart I posted ( Gross, Kyle ) shows that research on this subject has been done. The NASA curves are from 1964, and surprisingly, men haven't improved much physiologically since then.
The OP has some data of his own. He rode for 77 minutes and his 20 mph equates to approx 200 Watts, so he's just better than the UK Amateur tourist trials of Whitt's research.
It is a simple matter for the OP to copy and paste the chart onto a MS Word document, print it out and plot with a red pen HIS curve from 77mins/200Watts IN RATIO to the 'UK Amateur tourist trials' dotted line.
So for a 100 km ride, at 4 hours riding duration, the Wattage will be 110, or 15.75 mph. 4 x 15.75 = 63 or just over 100km.
That's close enough by reading off a printed chart.
The result is :- Start and sustain your speed to average 15.75 mph, not 20 mph.
Surprisingly to you perhaps but not to me and methinks most others.
This chart thingy you keep going on about makes assumptions that all the variables are equal. When have you ever gone out when:-
1) Weather conditions, wind direction, temperature etc.
2) your fitness levels
3) Terrain of route
4) Training beforehand leading up to the day in question
5) Level of effort
6) clothing.
7) Accompanied or solo
was identical.
All of the above can affect average speed so you can't say that you can ride for an average speed of x mph just because of some chart. Shakes head in disbelief.
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