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TT question(15 posts)

TT questiontandem
Jun 9, 2003 9:21 AM
When doing a 40k TT what cyclometer data do you like to observe while doing the race? Time, distance or avg speed? I don't use a heart monitor. It seems like they all have advantages and disadvantages. What would be most important.
re: TT questionSTEELYeyed
Jun 9, 2003 9:47 AM
I use HRM and distance, I try to stay at 92% of max.HR until the last mile or so, if I have anything left at that point, I use it and repay the oxygen debt after the race.
Speed, cadence. (nm)Jon Billheimer
Jun 9, 2003 10:07 AM
Cadence, speed and HR.MR_GRUMPY
Jun 9, 2003 10:13 AM
It's so easy to let your consentration wander on a TT. If you aren't checking out your heart rate or cadence, you'll begin to notice how bad your body is hurting. You've got to find ways to distract your brain from noticing this.
Jun 9, 2003 10:21 AM
I try to focus on my cadence and heart rate, and let them dictate my gearing. Pretty much 80-100 rpm, somewhere betweeen 88-92% of max HR, and pedal away. It's a mental game, at least for me, so sometimes I'll zone out a little, think about grocery lists or new parts I'm coveting, or just look at the road ahead.
Most courses are marked for distance, so the last mile/kilometer, I give everything I've got left, but until then, it's all about cadence, HR, and how I feel.
percieved exertionTime Trial dot org
Jun 9, 2003 11:26 AM
for the most part, i have found that PE (percieved exertion) is the best guage for measuring TT performance. I also use a HRM but do not look at it except when doubing my ability to estimate my PE.

once you train yourself to be able to accurately estimate your PE you will concentrate more on your efforts and less on your monitoring devices

I do not use a cyclometer at all, with PE you are giving it your all and cyclometer data matters little

wind and hills are negligeable because your PE should remain consistant over the course (except extended steep hills and downhills when coasting) despite your speed.

i use a stopwatch and PE, that's it
Never-ever coastMR_GRUMPY
Jun 9, 2003 1:02 PM
That's the time to pour it on.
Never-ever coastTime Trial dot org
Jun 9, 2003 2:08 PM
I top out my 54/12 on some downhills and cannot spin fast enough to generate power, this is what I am referring to, 45+ mph descents in the aerobars.
Sorry, no hills like that in Time Trials in IllinoisMR_GRUMPY
Jun 9, 2003 5:02 PM
I think that the fastest I've gone downhill in a TT is 36-38 mph. The flipside of that, is that the hill aren't so bad.
Sounds like you might be able to use a 56/11 on some of those downhills, near the bottom, after you start to slow down.
why hammer down the hills?Eric Marshall
Jun 10, 2003 9:04 AM
The faster you go the smaller the time difference
between going a little slower (and resting). And of
course, just the opposite is true going up hills.
time is timeDougSloan
Jun 10, 2003 10:04 AM
I did the Furnace Creek 508 as a team last year, meaning I did about 15 5-10 mile time trials an hour apart. I used 56x11 gears on my Cervelo, and could have used more gear. With long 2-5% grades in places, I could sustain 50 mph pedaling, and would get spun out; I would have lost lots of time and had my HR drop to near resting level with lower top gearing. One of my team mates used 61x11 gears, and combined with his 220 pounds, made up lots of time over our adversaries in places.

Jun 10, 2003 11:16 AM
Holy crap, I'm glad that I never see hills like that.
Jun 11, 2003 6:42 AM
Hills in the desert are awesome. There is one climb on the 508 route around 390 miles that is 22 miles long, with no flat or descent areas (bonked there 2 years ago). Some of the descents are darn close to that long. The one from Townes Pass to Death Valley drops 5,000 feet continuously with speeds from 60-70 mph; it levels out to about 2-3% over the last 5 miles, where you can really haul if you have the right gearing. Big gears good.

NEVER COAST!!!!!!!rrjc5488
Jun 14, 2003 8:20 PM
ok... lets say person A represents you coasting on a downhill, and person B represents you hammering on a downhill. Person A and person B both keep a speed of 25 mph on flats.
(this principal works for any speeds)
You have a 100 yard long downhill at a 5-7% grade. Person A hits 50mph coasting, and person B hits 65mph hammering. and lets say you lost 5mph every ten seconds. so: we have two people, one going 50, one going 65. in ten seconds, the person A (doing 65) will go 150 feet further than person A (going 50). then they're at 60mph and 45mph. in ten seconds you gain another 150 feet. then they're at 55mph and 40 mph, in ten seconds person A gains another 150 feet. then they're at 50mph and 35 mph, in ten seconds you gain another 150 feet. then they're down to 45mph and 30 mph, in ten seconds person A gains another 150 feet. then person A is at 40mph and person B is at 25 mph (normal flat ground speed) in ten secnods, person A gains another 150 feet. ten seconds later they're at 35mph and 25mph (person B doesnt lose any speed because thats his flat speed) in ten seconds person A will gain 100 feet) then person a is at 30mph and person B is at 25mph, you'll gain 50 feet. Then both of them are doing 25mph. the total amount of feet that person A gained over person B is: 800 feet!!

Yes I know you decrease speed faster at high speed rather than low speed, but I'm just trying to get the point across that hammering on hills will get you that much further than just coasting. Obviously if you were goin' to hard at the beginning, and you're getting tired, going all out isnt the smartest thing, but definitley pedal a little harder than you normally would have. But NEVERRRRRR EVERRRRR COAST ON A DOWNHILL. thats the place you can gain SERIOUS time.

If anyone understands this, and think they can explain it better, please do. Thanks, and good luck.

"be one with the bike"
best use of powerDougSloan
Jun 16, 2003 10:07 AM
The flip side is that for any use of given power, you get the most time first on climbs, then flats, then descents, since less of your power is eaten up by wind drag.

Some people take that to mean you should never apply power on descents. Not the case. Maybe you should work less hard on descents compared to climbs, but that does not mean coasting is best. If you run, say, 165 bpms heart rate on climbs, you may still make good time at 155 on descents, and not be wearing yourself out since you are under threshold.

Also, gearing makes a huge difference. If you can descend at 100 rpms pedaling in a big gear, you'll not waste as much energy as you might at a really high rpm spun out in a smaller gear.