Read what i linked. Kilojoules and calories are the same thing. Both measures of energy. The conversion is the same as miles kilometers. It isnt up for debate, it just is because it’s math.
And yes, in your golf example the 300lb guy does do more work. But if we both ride, whether stationary or outside, and have the dame avg watts, we did the same work. Watts is a measure of work. Also not up for debate as that is math as well.
To be analogous to your golf example, a 150lb and 300lb person go on the same ride and finish in the same amount of time then yes the 300lb guy does more work, and his watts will be higher and convert to more kJ and calories.
I don’t get your premise here? On an outdoor bike its a strain gauge, literally how much force is on the pedals. Same with the peloton bike+. On the original bike its a lookup table based on cadence and resistance.
Are you questioning the science of measuring work?
no I’m not questioning science and math, “this house believes” and all that.
I started this whole thing by asking the question of what the conversion between kj and kC was.
You gave that to me in a mathematical sense, which there is no debate.
I comment that’s not what’s represented in the Pelaton, or really any other equipment as there’s a weight factor, and it takes more energy to move more weight in the real world but I’m not sure how that works on a stationary bike.
you give me more math, which there is no debate, even though we both agree that it takes more work (and consequently energy right?) to move more mass across the same distance in the same time
you said the wattage measurement would then be different, but if watts are used to measure kj, and we have two equal kj measurements but different kC values…???
are they assuming different efficiency values for different BMIs or what are they doing to come up with different kC values?
there’s a piece missing somewhere. we’ve gone WAY farther into this than needed because I’m both stubborn and curious.
Since I too had my concerns, the way we measure watts is a set algorithm combining cadence and resistance. That has nothing to do with the rider, it’s the same for everyone. Someone who weighs 150 lbs and does that ride vs someone who is 250 who does it…they’ll still have the same output (watts).
But they will exert themselves different. @marklemcd is saying - and I reluctantly believe him - that the energy expended is the same, and hence the calories are the same, despite what Peloton says. The difference is in how much that energy means to the individual. To the example you used, a 300 lb guy walking the golf course vs a 150 lb guy walking, if they both walk at the same speed, they DON’T have the same resistance (one guy is carrying twice as much weight). So their watts (and calories) will differ.
this makes sense…but the Pelaton is measuring watts produced by the bike, not by the individual. is that why they (and all other equipment) factor weight in? I’m very willing to believe the calorie thing is just a marketing trick that’s inaccurate for stationary equipment because the individual isn’t actually moving horizontally/vertically across space.
Yes of course. But I’m a guy that back when I was auto racing wanted to understand how it all works, so I built my own engine.
interesting. I’m not using a heart rate monitor so I wonder what they’re using for assumptions. Weight plays into this somehow, as I’ve noticed that when I’ve forgotten to update my weight to 200 from 150 or whatever the default is on the machine the calories metric drops by maybe 10%.
Well, you came in with the energy of a guy that brought a Camry to track day once then jumped on a message board with NASCAR drivers to tell them that it doesn’t seem that hard to just turn left a bunch.
Hey @JamesHCard - I did the Beatles ride with LeAnne. Good ride. Are they allowed or are they hated similarly to the other great British bands you hate?
So I’ve just started using the peleton app with our (cheap and generic) spin bike. So don’t have all the fancy settings.
Any rides or coaches in particular you guys like? There are so many options it becomes a little bit overwhelming. I’ve never been much of a rider so it’s a bit of a challenge for me. Would love some suggestions, thanks!
