Concept2 Forum

The use of the term "scientific" referred to the "fact" that "it seems" to be the go to rowing ergometer for published studies. You know, science. Well, it is one of the most available and understood instruments for measuring net mechanical energy output. So I would not be suprised if it was common...

I didn't know there were right and wrong threads. I was responding to a comment in this thread. I'd be happy enough to see the discussion in another. The C2 PM(x) measures work delivered to the flywheel. It does not measure all mechanical work done by the body. I don't see why that makes it "not a ...

While you don't care, I have come to believe that as a screening tool, it is not necessary to know the anaerobic threshold to do this evaluation. The assessment will be better if one knows this but most people don't have a clue what that is so how to assess them. So you want people to move for 10 m...

I will accept I made an error when I said CO increased 20 times when I meant Oxygen delivery increased 20 times. It is the interweb and my editor is on vacation. Your problem is your intent is to belittle me Initially I simply asked if you really meant CO since your values were so extreme. You doub...

My calories probably won't be yours in real life: a key element in the calculation underpinning 300 calories should be the persons weight. But then again: most people don't make a big deal out of it. If we're talking about work applied to the flywheel, my calorie = your calorie = 4.2 joules = 4.2 n...

I think you are in the wrong thread. What makes C2 not a true ergometer is they don't account for the work done overcoming the shock cord. It would be very easy to do but they chose not to. What makes it valuable as a "scientific" training tool is output is repeatable and self calibrating. I didn't...

I don't believe you understand cardiorespiratory physiology well. Based on the comments you keep making, I understand it better than you. You said: First, I am not trying to estimate VO2max. Rather, I am trying to estimate METS capacity as that is the basis of the risk assessment. They are related ...

I am confused. What did I get wrong again? I said that resting VO2 is 3.5 mL/kg/min, and you said I should check my data because resting VO2 is 250 mL. There is no difference but you didn’t recognize that. Otherwise why bring up 250 mL and tell me to check my data? Let me make one clarification for...

JaapvanE: I'd be very interested to learn more about the history of C2 and the open project you're talking about. I have read the original C2 patent and I think it is quite clever. I don't agree that it makes wild assumptions in calculating power to the flywheel. It needs to know the angular moment...

I have no clue who is figuring this stuff out for Apple. But, I can assure you being "smart" does not mean you see everything or understand everything. My guess is they have a bunch of exercise physiologists whose knowledge of cardiac physiology is limited. If they have a bunch of cardiac anesthesi...

I am confused. What did I get wrong again? I said that resting VO2 is 3.5 mL/kg/min, and you said I should check my data because resting VO2 is 250 mL. There is no difference but you didn’t recognize that. Otherwise why bring up 250 mL and tell me to check my data? Let me add one more extraneous fa...

How does one know where they stand. Apple was telling me I am below average when I am clearly 75th percentile or better. That is the point of my idea, giving a better assessment than what is available now. Who cares? As I said before: any metric is a guess based on half decent measurement combined ...

For those that question what is going on regarding cardiac output here is a link for you. https://academic.oup.com/bjaed/article/4/6/185/314696 From this paper. The increase in blood flow to muscles requires an increase in the cardiac output, which is in direct proportion to the increase in oxygen c...

Some people here are seriously over thinking things and have disappeared down the rabbit hole. Once you decide you do not want to be a couch potato your whole life and start some regular exercise all your interested in how you are placed against the general population not elite athletes If you can ...

You might want to check your data. You might want to check yours. For somebody who keeps claiming to be an expert in physiology, you keep bungling some pretty basic concepts. Resting VO2 is about 250 ml/min in a 70 kg man. And 70 kg x 3.5 mL/kg comes out to about 250 mL per minute! You really don't...