The towel on top of the mat is the real sign that you know what’s up. I swear I’ve never sweat this much in my life until we got this bike
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We have four people in the household who ride so it easily gets used three times a day. It’s a little “extra” as my kids say, but it helps out.
Who’s got a pick for this week? I retested my FTP yesterday so last week wasn’t too exciting to make sure I had fresh legs for that. Looking forward to something new this week!
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Really trying to resist the urge to buy a Peloton right now (the Refuge keeps encouraging me to spend money). Knowing there is such a gap in actually getting it helps resist, but man I know I need one of these to actually make me exercise since I don’t have time to get to the gym. Decisions!
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I took this last week. Came within a few of setting a new PR. I think a few have already taken it but climb rides are always fun and exhausting.
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Nice. I think my last climb ride was the 45 min Alpe d’Huez suggestion on here. I’ll put this on the schedule.
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The pelaton is cool, and imma bout to go get on it, but this is also very effective and less than half the price. I don’t know what lead time is, but at the beginning of covid hell I ordered one and got it in like 3 days.
Thankfully, my office just put one of these in our new gym. Pumped to give it a try as past rowing experiences have kicked my ass.
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Just getting back on the Peloton last week after a few months off. Easing back in…looking forward to being a regular here soon
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no delusions about keeping up with the regulars on this thing.
i couldn’t get any of the classes to load, ended up doing some rower/pushup intervals before it eventually worked. did a 20min instead of 30min class, and tried my first non-beginner level. it was harder and modifying technique helped engage the core better. did some KB swings and shoulder presses after and feel like it was a pretty good comprehensive workout.
how does the correlation between kcal and total output work?
Total output is literally just a combination of your resistance and cadence. Everyone riding at that same combination will have an identical output.
The kcal is Peloton saying how many calories you’ve burned. This is much less scientific. Indeed, my man @marklemcd insists that you should just assume your output = calories. I’m not 100% convinced, as it’s hard for me to think that a 150-lb person and a 250-lb person would burn the same amount of calories while generating the same output.
@greebs doesn’t believe in science people! j/k mostly
Calories are indeed a measure of energy, and so in the joule. So since we have two units measuring the same thing we can convert between them. And in the case of cycling with a power meter, we also have something that can measure work (watts).
So first you need measure work over time to know how much energy is expended. No matter what, in order to work at 100 watts for 30 minutes you need to expend 180kJ. The math is simple: watts/100 *60 * min will always yield your kJ. So 100 watts for 30 minutes is 180 kJ of energy.
And the conversion to kCal is straightforward. 1kCal = 4.184kJ. So that means 180kJ of cycling energy is 43kCal? Ahhh, but the human body is not a perfect machine that has to follow the laws of conservation of energy. Humans are only about 20-25% efficient. so that means that 180kJ that peloton tells us we used is between 172-215 kCal.
So using the kJ as kCal is close enough.
Below is a post from cycling experts that I got all this from, this is the same math that pretty much all bike racers will use. It also explains why heart rate is inaccurate for calories.
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yeah I remember from high school physics or chem that 1 cal is the amount of energy it takes to heat 1 oz of water 1 deg or whatever it is.
Work as measured in kj, and using it to convert to calories is interesting. The other input to the formula seems to be weight, and I agree that in the real world, it takes far more work, and thus energy to move a heavier object up a hill or across a golf course. But does a weight really matter on a stationary piece of equipment?
Seems like that would be a much more direct relationship between electricity produced by the bike and calories required to do so. I think there is an element of resistance from bodyweight on the upstroke when off the seat. I was just looking at some of the workouts posted and saw a pretty big variance across kcal with similar outputs. much bigger than I’m used to seeing across elipticals.
Join us…and use the app in the interim to get yourself moving. Stretching, running classes are great and I’ve even done a few yoga classes now
Doesn’t matter outside. If we put out the same watts we burn the same energy. The heavier person will go slower
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I don’t buy it.
It takes more energy to move a heavier object, no getting around it.
Yes it does. So same watts, heavier person goes slower.
Watch cyclists climb a hill.
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ok, but you’re changing/adding other variables to make the equation work. If you take a 300lb dude and a 150lb dude, walking the same golf course both in 4hrs…that 300lb dude did more work and burned more energy.
add mass to a car and it loses fuel efficiency.
As it relates to the pelaton stuff, if the kj across two users are equal, I was asking about the conversion to kcal in this specific application. What are the inputs to that conversion that’s causing a more dramatic variance than I’m accustomed to across other equipment?