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Old 05-05-09, 03:12 PM   #1
procrit
carbon is too light
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Vo2 Max Tested

So I had my vo2 max tested after a 100 mile ride, 12 hours of driving, although I will say I had some good sleep and lots of food. Legs were still sore, blew up at 390 watts, wierd.

My result: 4.75 l/min... @ 165 lb that put me at 63.5 l/kg/min. I really think I can do better than that, the tester thought I had some room to go as well, especially if I drop some weight. Good engine, just a lot of weight to haul around.

Anyone else have there's tested recently?
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Old 05-05-09, 03:37 PM   #2
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I did mine last year, although it was a "submax" VO2 "assesment". I maxed out at 400W and 66 VO2/kg
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Old 05-05-09, 04:14 PM   #3
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I don't remember what I maxed out at, but I hit 70-75ish. I've since dropped about 5lb from what I was then, so it's probably gone up.
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Old 05-05-09, 05:41 PM   #4
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V02 threshold is much less trainable than lactic threshold correct? If I remember hearing correctly you can only look to get 2-3% increase in vo2 but 10+% on lactic? If so with a 2-3% lifetime gain it seems the time could be better spent on training LT with the little glucose strip machine
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Old 05-05-09, 05:58 PM   #5
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Mine was pathetic, VO2 max was 51.1 ml/kg/min.......VO2 was 3.83 L.
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Old 05-06-09, 08:38 AM   #6
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Absolute vo2 max is pretty hard to train, but relative vo2 max is pretty easy to boost if you can lose weight. I'm getting lactate threshold testing done in a few weeks...
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Old 05-06-09, 10:11 AM   #7
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Mine was done about a month ago, 55 ml/kg/min. I maxed out at 410watts.
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Old 05-06-09, 10:22 AM   #8
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74.3ml/kg/min

not exactly a useful test though. I just did it a couple times to help out a buddy doing some exercise science research
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Old 05-06-09, 10:29 AM   #9
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74.3ml/kg/min

not exactly a useful test though. I just did it a couple times to help out a buddy doing some exercise science research
aside from bragging, I cant think of a single reason that these tests would be useful ...
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Old 05-06-09, 11:04 AM   #10
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^^^ That's why I'm also doing before and after 10mi time trials, and several blood lactate tests as part of the study. Your own personal vo2 would be a good indication of aerobic improvement, but then again, so would wattage.
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Old 05-06-09, 11:12 AM   #11
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There is a thread on the wattage forum to predict VO2 max from 5m wattage. Assuming you could go the other way, and since VO2 max is not really trainable, I would think knowing your actual VO2 max could tell you your theoretical best 5m power, no?
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Old 05-06-09, 11:23 AM   #12
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I find the VO2 protocol interesting. Mine (and I think most) have you complete one minute at each interval. But it takes upwards of 60 seconds for your HR (and other systems) to completely adjust to that level. So by the time you adjust, you go on to the next level.

I've seen some tests down with 2-minute cycles. Not sure of the science behind that or if the results compare otherwise.

MD. The only benefit I got from my was properly setting my zone 2 and 3 heart rates. Previously I've been riding at way too low during base and really not getting any benefit from it. I had mine tested at the end of last season and used those levels. I dropped 10lbs in 2 months and had my best early season ever.

Correlation? Maybe...
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Old 05-06-09, 11:24 AM   #13
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Originally Posted by umd View Post
There is a thread on the wattage forum to predict VO2 max from 5m wattage. Assuming you could go the other way, and since VO2 max is not really trainable, I would think knowing your actual VO2 max could tell you your theoretical best 5m power, no?
Greg LeMond seems to think so.
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Old 05-06-09, 11:48 AM   #14
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carbon is too light
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Originally Posted by umd View Post
There is a thread on the wattage forum to predict VO2 max from 5m wattage. Assuming you could go the other way, and since VO2 max is not really trainable, I would think knowing your actual VO2 max could tell you your theoretical best 5m power, no?
Where is this chart? Got a link?
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Old 05-06-09, 11:57 AM   #15
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My best 5' is ~390 watts. So 390 watts / 4.75 L/min = 82.1 W/L/min. ?
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Old 05-06-09, 11:59 AM   #16
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Quote:
Originally Posted by procrit View Post
Where is this chart? Got a link?
Well, it wasn't a chart, it was on the wattage group.

The forumula was VO2 max= 1.8*((P5min*6.12/Kg)+3.5)+3.5

Although comments from Coggan in the thread indicate that one of the +3.5 terms is extraneous.

Quote:
Probably from knowing that:

1) 1 W = 6.12 kgm/min


2) resting VO2 is ~3.5 mL/min/kg


3) the slope of the VO2 (measured in L/min)ower (measured in kgm/
min) relationship is ~2.


The only additional assumption required is that 5 min power is 2/1.8 x
100% = 11.1% higher than power at VO2max (adding 3.5 mL/min/kg twice
seems to be a mistake
).


As for the accuracy of the predicted VO2max, it would be +/- ~10%...

Andy Coggan
Quote:
> So Andy, is the proper estimation formula to add the 3.5 mL/min/kg
> before or after multiplying by 1.8?

After.
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Old 05-06-09, 12:17 PM   #17
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Rule of thumb calculation is: VO2 = 12 * PTW + 3.3 where PTW is your power to weight in W/kg at 5 minutes. My tested VO2max is within about 2% of that.
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Old 05-06-09, 12:21 PM   #18
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Quote:
Originally Posted by currand View Post
Rule of thumb calculation is: VO2 = 12 * PTW + 3.3 where PTW is your power to weight in W/kg at 5 minutes. My tested VO2max is within about 2% of that.
Yeah, that foumula I posted above corrected comes out pretty close to that (11 instead of 12, 3.5 instead of 3.3)
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Old 05-06-09, 12:40 PM   #19
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Originally Posted by currand View Post
I find the VO2 protocol interesting. Mine (and I think most) have you complete one minute at each interval. But it takes upwards of 60 seconds for your HR (and other systems) to completely adjust to that level. So by the time you adjust, you go on to the next level.

I've seen some tests down with 2-minute cycles. Not sure of the science behind that or if the results compare otherwise.

MD. The only benefit I got from my was properly setting my zone 2 and 3 heart rates. Previously I've been riding at way too low during base and really not getting any benefit from it. I had mine tested at the end of last season and used those levels. I dropped 10lbs in 2 months and had my best early season ever.

Correlation? Maybe...
Glad it has worked favorably for you.

I used to do these tests, a coach I worked with used them to derive HR training zones. The tests I did were on new leaf or green leaf (cant recall which it is) software systems where I was on a computrainer with a breathing apparatus strapped to my head, and coach turned up the watts every so often. The measurements were fat calories/hr., carb cal/hr. or something like that, and if I recall correctly, the point at which carb cal > fat cal was considered the LTHR, then I had to go to maximal effort for arriving at VO2Max.

These things hurt, alot, and the data was interesting from a gee whiz point of view, but IMO, I think putting on a HR strap and doing a 30 min. TT effort and getting avg. pwr. from the last 20 mins. (or whatever is the friel methodology for obtaining LTHR) and deriving zones from that puts an athlete in a similar place.

The only real objection I have to the vo2max tests is if they cost something. In my experience, the costs arent worth the data obtained because there are more economical ways to arrive at the same place. as always, YMMV.
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Old 05-06-09, 01:02 PM   #20
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VO2 max= 1.8*((P5min*6.12/Kg)+3.5)+3.5

That formula gives me a vo2 of 4.3 L/min @ 390 watts, but if I go backwards from the known 4.75 L/min, I get 430 watts. That would be pretty cool.
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Old 05-06-09, 01:25 PM   #21
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Maybe its telling you your 5min is under-developed? And just to be sure I imagine getting one of the 3.5s in the wrong spot going backwards would inflate your wattage. Not questioning your math skills, just sayin...
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Old 05-06-09, 01:31 PM   #22
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Ha, definitely didn't mess up the math. 28 hours of math in college, engineer by day, simulation / systems modeling / programmer by night, cyclist when I have time. =)
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Old 05-06-09, 01:32 PM   #23
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FWIW, mine was off by 25W using a VO2 tested at 200lbs and a P5min tested at 190lbs. There is a strong correlation between the wattage you generate and the weight you generate it at when testing so, when i adjust the weight properly its off by 2.5%

Math is cool...
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Old 05-06-09, 02:14 PM   #24
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man I hope that formula is off or my 5 min power is way off....because my VO2 would only be like 33 haha.

The problem is i'm a heavy guy. My max 5 min power right now is 274w at 255lbs. This is just over the course of riding...havent' done any 5 minute tests. I really need to lose some weight!
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Old 05-06-09, 02:15 PM   #25
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Quote:
Originally Posted by procrit View Post
VO2 max= 1.8*((P5min*6.12/Kg)+3.5)+3.5

That formula gives me a vo2 of 4.3 L/min @ 390 watts, but if I go backwards from the known 4.75 L/min, I get 430 watts. That would be pretty cool.
Didn't you see the part about the extra 3.5 term? It should be VO2 max= 1.8*(P5min*6.12/Kg)+3.5
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