40km under 1hr

macnab

Lumen wrote: »

Nowhere near that. Somewhere between 250W and 350W, depending on how small/aero you are. The time is irrelevant, 40kph is 40kph.

Using a very rough calculation based on my results in strava, the figure for my 5'5" height and 10.5 stone weight would be at least 288W.

kumate_champ07

This might be of use
http://www.analyticcycling.com/

Mycroft H

macnab wrote: »

Using a very rough calculation based on my results in strava, the figure for my 5'5" height and 10.5 stone weight would be at least 288W.

wow. what a difference weight and height makes.

I'm a foot taller and 3 stone heavier and I would need something like 330w.

Colonialboy

Joey Joe-Joe Jr wrote: »

If you have run a 2:35 marathon then you're certainly above average fitness. That is seriously quick! With some specific cycle training you should be able to achieve your goal no problem.

...

not neccessarily true ...I regularly cycled with very good runners , very light build , all skin and bones good at climbing and good stamina but generating the power and holding power on the flat or leading the 'train' was an isuse for them. It can depend on your build as to how quckly you can transfer a 2.35 marathon to a 25mph bike TT . Otherwise you might be needing a different program.

OP .... to achieve your goal ....
first do 20mph... then 21 mph then 22mph then 23mph ..then complete 24mph and then complete 25 mph ..
Or you could consider this situation.. Lance Armstrong could do a 50kmph TT at his best, but had trouble transfering that to a sub-3hr marathon. He has since improved his marathon time but it took a few years for his body to adapt.

seamus

Colonialboy wrote: »

Or you could consider this situation.. Lance Armstrong could do a 50kmph TT at his best, but had trouble transfering that to a sub-3hr marathon. He has since improved his marathon time but it took a few years for his body to adapt.

The aerobic fitness and muscular strength are two very different systems, which is the problem for transfers like this. Though wasn't Lance a triathlete before he rode the Tour?

Someone who can manage a 2.35 marathon will have the aerobic fitness to push themselves quite hard for a significant amount of time, but they don't have the muscular conditioning to do it properly. They might push themselves on the bike for an hour at a similar intensity that they would run at, but then find themselves unable to walk for the next few days.

As I have discovered from doing the opposite (cycling to running) and other posters like colm_gti have also discovered, your base aerobic fitness is very helpful when you start a new sport, but if push at the same intensity at which you are capable, that's a fast track to injuring yourself.

People who start from nothing have to build both aerobic and muscular conditioning together and while they'll find training harder, I reckon they're less likely to give themselves a long-term injury.

niceonetom

BX 19 wrote: »

macnab wrote: »

Using a very rough calculation based on my results in strava, the figure for my 5'5" height and 10.5 stone weight would be at least 288W.

wow. what a difference weight and height makes.

I'm a foot taller and 3 stone heavier and I would need something like 330w.

I've no idea if your initial calculations are at all accurate but it should be noted that 42 extra watts is very little to expect of 3 stone of extra mass - bigger guys are at a distinct advantage over the whippets when it comes to flat TTing.

It's more obvious if you look at these figures in terms of W/kg. Macnab's estimating 4.31 W/kg to get to 40kph while BX19 only needs 3.85 W/kg.

Throw in a few hills, even modest drags, and weights starts to matter very quickly of course.

Raymzor

macnab wrote: »

I told myself to ignore this thread, just do my usual training.
I had a look at strava to see what was my best/fastest KOM (i have 2) just out of curiosity.
However, as I approached the said segment today I couldnt help but notice that the wind was with me. An animal instinct took me over and suddenly I was trashing the pedals like a man possessed.
My heart rate climbed to new heights, whether through anticipation or work rate I couldn't be sure.
9.1km of torture later I allowed myself a mental pat on the back and a grin.
I decided the last 12km of my spin would be done at an easy pace, however the need to upload my stats and prove that I had just cycled 9.1km at a rate of at least 40km/h was just too much to ignore.
Now given that my KOM for this segment was set at an average of 37.5km/h last year I expected great things, as in historic results.

























38km/h.................speechless.

fair play. have a look at your gears. i bet you could that average higher-especially with a 40kw tail wind!

M cebee

i do about 25km/hr:mad:

out of curiosity i checked to see what times they do for the 40k in the itu triathlon series

the elite men are nearly bang on the hour
http://www.triathlon.org/results/results/2012_itu_world_triathlon_san_diego/7748/

Lumen

M cebee wrote: »

i checked to see what times they do for the 40k in the itu triathlon series...the elite men are nearly bang on the hour
http://www.triathlon.org/results/results/2012_itu_world_triathlon_san_diego/7748/

They'd go a lot faster if they didn't have to run 10k in 30 minutes immediately off the bike.

M cebee

yes they sure would;)

that alf engers referred to previously was 38 when he broke the uk record
http://cyclinginfo.co.uk/blog/277/training/25-mile-time-trials-times-and-training/
http://en.wikipedia.org/wiki/Alf_Engers

wasn't that old? at time 34 years ago