Average speed

[waggoner]

Just read something about that tonight. The example given in the book says,,if you increase the speed by a factor of 2, from 15mph to 30mph, you need to use 8 times the amount of energy.
If you go 8% faster you are pushing 25% more air, doing 25% more work, so using 25% more energy.
So the faster you go the more energy is needed in even for the smallest increase in speed......

I sure someone can explain it better,, thats just a quote. I'm no good at this phyics stuff!!!

Most of my riding is done at night,,,i work nights so not much choice riding to work and back,,i quite like it,,apart from friday nights, when the drunks are staggering about!!

 

[Willo]

Re riding in the dark, maybe I'm a coward but after doing a winter of 6am runs to the station, I now use the spin bikes in the gym in the mornings during winter and limit my cycling to weekend runs in the daylight. Not so much the traffic that gets me in the dark, it's the pot holes that have me holding back which in turn means my workout suffers and, more importantly, it's not enjoyable. Guess I could splash out for a better light set up (i.e. to see rather than just to be seen) but even then the concentration required to spot the holes in time to avoid them takes away the fun for me.

 

[ianrauk]

The winter is the best time of year to be cycling in my opinion. It rarely goes below zero and rarely frosts over where I am.
Put some nice warm layers on and get out there, love it!

Ok getting out of bed at 7am and getting on the bike is a bit of a pain when it's 0 degrees but once you are warmed up it's just like riding in the summer, but without loads of sweat.

Agree with this 100%.
A lovely sunny crisp winter morning ride is one of cycling's great pleasures.