Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Road Cycling It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle. -- Ernest Hemingway

User Tag List

Reply
 
Thread Tools Search this Thread
Old 12-10-06, 06:51 AM   #1
bdcheung
Carpe Diem
Thread Starter
 
bdcheung's Avatar
 
Join Date: Sep 2006
Location: MABRA
Bikes: 2007 CAAD9; 2014 CAADX; PedalForce CG1
Posts: 13,149
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Watts in Spin Class



Tom Danielson averages 408 watts in "Spin class". insane!
__________________
"When you are chewing the bars at the business end of a 90 mile road race you really dont care what gear you have hanging from your bike so long as it works."
ΛΧΑ ΔΞ179 - 15% off your first Hammer Nutrition order!
bdcheung is offline   Reply With Quote
Old 12-10-06, 08:46 AM   #2
GuitarWizard
Used to be a climber..
 
GuitarWizard's Avatar
 
Join Date: Aug 2005
Location: East Baldwin, ME
Bikes: 2016 Ridley Fenix SL, 2013 PedalForce RS3-ISP, 2015 Trek 520 Disc
Posts: 6,834
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Man I wish I could afford an SRM
GuitarWizard is offline   Reply With Quote
Old 12-10-06, 08:48 AM   #3
Squint
base training heretic
 
Squint's Avatar
 
Join Date: Aug 2003
Location: Denver, CO
Bikes: Cervelo P3C, many Litespeeds
Posts: 716
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
His SRM is displaying current, not average power, on its screen. If it was showing average, it would say AVR in the upper left corner.

Even TD can't sustain that much power indoors. Riding indoors without a massive amount of air movement will cut your power output by 1/3 to 1/2. 400W of power to the rear wheel means the body has to dissipate 1200W of heat.

That's why I call BS whenever I hear about people burning 1000 Cal per hour (277W) in spinning class. There are probably only a handful of people in this country that could do that indoors with little to no cooling. Yeah, and they all hang out on bikeforums.net or are the teammate of someone on BF.
Squint is offline   Reply With Quote
Old 12-10-06, 08:53 AM   #4
msheron
I-M-D bell curve of bikn'
 
Join Date: Dec 2005
Location: NC mountains
Bikes: 06' Jamis Eclipse in the making.
Posts: 2,926
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
^^^ Someone woke up grouchy
__________________
Ego Campana Inflectum of Circuitous
msheron is offline   Reply With Quote
Old 12-10-06, 09:03 AM   #5
shawneebiker
Senior Member
 
Join Date: Nov 2005
Location: Kansas City Area
Bikes: Whatever I want
Posts: 427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Squint
Even TD can't sustain that much power indoors. Riding indoors without a massive amount of air movement will cut your power output by 1/3 to 1/2. 400W of power to the rear wheel means the body has to dissipate 1200W of heat.

That's why I call BS whenever I hear about people burning 1000 Cal per hour (277W) in spinning class. There are probably only a handful of people in this country that could do that indoors with little to no cooling. Yeah, and they all hang out on bikeforums.net or are the teammate of someone on BF.
1/3 to 1/2. B.S.
shawneebiker is offline   Reply With Quote
Old 12-10-06, 09:15 AM   #6
Squint
base training heretic
 
Squint's Avatar
 
Join Date: Aug 2003
Location: Denver, CO
Bikes: Cervelo P3C, many Litespeeds
Posts: 716
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by shawneebiker
1/3 to 1/2. B.S.
Indoors at 60-70F with no moving air, you will be sweating like a hog after riding even L1 for 10 mins.

I haven't read it myself but I remember someone mentioning a study where world class cyclists were made to ride indoors sans cooling at a power output they could sustain for 30-60 mins outdoors. They crapped out after just a few minutes.
Squint is offline   Reply With Quote
Old 12-10-06, 09:27 AM   #7
shawneebiker
Senior Member
 
Join Date: Nov 2005
Location: Kansas City Area
Bikes: Whatever I want
Posts: 427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Squint
Indoors at 60-70F with no moving air, you will be sweating like a hog after riding even L1 for 10 mins.

I haven't read it myself but I remember someone mentioning a study where world class cyclists were made to ride indoors sans cooling at a power output they could sustain for 30-60 mins outdoors. They crapped out after just a few minutes.
Maybe if your riding in a sauna. My basement is 68 degrees pretty much year round. L1 for 10 minutes isn't enough to even break a sweat without a fan. I do ride L4 with a small fan and I can sustain 260 watts for an hour but that is my current FTP.
shawneebiker is offline   Reply With Quote
Old 12-10-06, 10:10 AM   #8
VosBike
Outgunned and outclassed
 
Join Date: Oct 2003
Location: The Springs, CO
Bikes:
Posts: 998
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have no powermeter, but by comparing cycleops power estimates with calculated power for outdoor riding (niether of which are particularly accurate) I find I can produce slightly less power indoors (maybe 10%).

However, the online power calcuators are known to greatly overestimate power output, so who knows.
VosBike is offline   Reply With Quote
Old 12-10-06, 10:19 AM   #9
BikeWNC
Climbing Above It All
 
BikeWNC's Avatar
 
Join Date: Oct 2004
Location: Basking in the Sun.
Bikes:
Posts: 4,146
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I use two fans when on the trainer. I still need a towel to mop up the sweat. I hate riding indoors.
BikeWNC is offline   Reply With Quote
Old 12-10-06, 10:58 AM   #10
Snuffleupagus
Aut Vincere Aut Mori
 
Snuffleupagus's Avatar
 
Join Date: Nov 2004
Location: Chapel Hill, NC
Bikes: Irish Cycles Tir na Nog, Jack Kane Team Racing, Fuji Aloha 1.0, GT Karakoram, Motobecane Fly Team
Posts: 4,165
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Squint
His SRM is displaying current, not average power, on its screen. If it was showing average, it would say AVR in the upper left corner.

Even TD can't sustain that much power indoors. Riding indoors without a massive amount of air movement will cut your power output by 1/3 to 1/2. 400W of power to the rear wheel means the body has to dissipate 1200W of heat.

That's why I call BS whenever I hear about people burning 1000 Cal per hour (277W) in spinning class. There are probably only a handful of people in this country that could do that indoors with little to no cooling. Yeah, and they all hang out on bikeforums.net or are the teammate of someone on BF.
I'll say that's about right...a bit extreme given the data I see though.

At similar percieved exertion levels for one hour, I'm putting out around 700kj indoors, and 900kj outdoors. Something I believe contributes to that is that up the shorter roller climbs around here I'll be putting out 500-700ish watts, and on the trainer I hardly ever exceed 350 watts, as I've got to be spinning like a mad man, even on max resistance to get up to 600ish.
Snuffleupagus is offline   Reply With Quote
Old 12-10-06, 11:22 AM   #11
shawneebiker
Senior Member
 
Join Date: Nov 2005
Location: Kansas City Area
Bikes: Whatever I want
Posts: 427
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Snuffleupagus
I'll say that's about right...a bit extreme given the data I see though.

At similar percieved exertion levels for one hour, I'm putting out around 700kj indoors, and 900kj outdoors. Something I believe contributes to that is that up the shorter roller climbs around here I'll be putting out 500-700ish watts, and on the trainer I hardly ever exceed 350 watts, as I've got to be spinning like a mad man, even on max resistance to get up to 600ish.
Apples and oranges, unless you use the same bike indoor and outdoor with the same PM.
shawneebiker is offline   Reply With Quote
Old 12-10-06, 12:11 PM   #12
munkyv22
You got Madoned!
 
munkyv22's Avatar
 
Join Date: Sep 2006
Location: Rio Rancho, NM
Bikes: 2006 Trek Madone 5.2 SL
Posts: 1,728
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I use a big-ass industrial fan pointed right at me on the trainer. Doing intervals indoors, I still look like I just got out of the shower after the 3rd 10 minute set at zone 5.
munkyv22 is offline   Reply With Quote
Old 12-10-06, 12:21 PM   #13
brianappleby
Senior Member?
 
Join Date: Oct 2005
Location: Denver
Bikes: orbea onix, Cervelo SLC, Specialzed Allez, Cervelo P3 Alu
Posts: 1,975
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by shawneebiker
Apples and oranges, unless you use the same bike indoor and outdoor with the same PM.

I've trained w/ my bike and a powertap and agree with the posts here. Same bike and Powermeter, but I'm dealing with a LT around 270 watts indoors (my guess) instead of 320 outside (tested). I am glad to hear that it's a known effect, and I'm not just being a wuss.
brianappleby is offline   Reply With Quote
Old 12-10-06, 01:14 PM   #14
fuzzthebee
bzzzz
 
fuzzthebee's Avatar
 
Join Date: Feb 2005
Bikes:
Posts: 360
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by munkyv22
I use a big-ass industrial fan pointed right at me on the trainer. Doing intervals indoors, I still look like I just got out of the shower after the 3rd 10 minute set at zone 5.
I use an industrial fan also. It's about as powerful as a small plane I can produce equal if not more power indoors. I sweat, but the fan is so strong that a drop rarely hits the floor. And, for the record, last saturday I did 3101 kJ of work in 3:04 @ 85% of my FTP. (1011 kJ/hr)
fuzzthebee is offline   Reply With Quote
Old 12-10-06, 01:28 PM   #15
Duke of Kent
Senior Member
 
Duke of Kent's Avatar
 
Join Date: Jul 2005
Location: Blacksburg, VA
Bikes: Yeti ASRc, Focus Raven 29er, Flyxii FR316
Posts: 4,846
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Quote:
Originally Posted by fuzzthebee
I use an industrial fan also. It's about as powerful as a small plane I can produce equal if not more power indoors. I sweat, but the fan is so strong that a drop rarely hits the floor. And, for the record, last saturday I did 3101 kJ of work in 3:04 @ 85% of my FTP. (1011 kJ/hr)
Indoors, I can't do more than ~10 minutes at my usual 20-25min test wattage without burning up. I've never felt that feeling on the road, even on days when it was 105*F outside. So I back it down a notch and try to go as long as possible without overheating.
Duke of Kent is offline   Reply With Quote
Old 12-10-06, 02:35 PM   #16
Snuffleupagus
Aut Vincere Aut Mori
 
Snuffleupagus's Avatar
 
Join Date: Nov 2004
Location: Chapel Hill, NC
Bikes: Irish Cycles Tir na Nog, Jack Kane Team Racing, Fuji Aloha 1.0, GT Karakoram, Motobecane Fly Team
Posts: 4,165
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by shawneebiker
Apples and oranges, unless you use the same bike indoor and outdoor with the same PM.
It's the same rig, just hooked up to a mag trainer.
Snuffleupagus is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 09:18 AM.