Power meter owners: do you ever ride for kJ?
#1
Making a kilometer blurry
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Power meter owners: do you ever ride for kJ?
On my commutes, a couple times per week, I find myself trying to crack 300kJ before I arrive at my destination, just for a threshold/VO2 workout. Does anyone else try burn a certain number of kJ before a landmark?
#2
A Little Bent
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I don't but my coach says he uses that as the marker to determine the effort I put out for the week...
Edit...I use it to determine how many S'mores I can eat...
Edit...I use it to determine how many S'mores I can eat...
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#4
Making a kilometer blurry
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Not sure if I should say yes or no to this. Never X kJ in Y distance. I do watch it and stretch my ride out if I want to burn more depending on my diet for the week. I do find myself watching the kJ and thinking "Ah... another 15-20 minutes maybe" Likewise, I find it easier to think of "average watts" easier in kJ/hr vs watts. I "feel right" on long rides at 850 kJ/hr. Not sure what that is in actual watts, but I guess it's around 240-245? If I'm pushing 900+/hr I will back off on endurance days.
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ive recently been looking at it a lot more because of my weight loss plan but I havent used it as a marker yet.
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Now that I'm doing base in preparation for next season (working on my "endurance" limiter), I ride for kJ, slowly building up the amount of work I do per ride. Need to train my body to utilize different fuel sources.
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#10
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That's basically what I'm trying to do... my body burns through glycogen stores just fine, but doesn't seem to like using fat as fuel.
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#11
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During base training, sometimes I'll try to beat 1750 or 3500 (roughly half-pound or pound of fat)
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I'll target the number of KJ's to determine how many beers I get to drink.
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^^ or how many beers you won't have to drink to get tanked.
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#14
Making a kilometer blurry
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Yeah, I've certainly tracked kJ for most rides, for Calories burned estimates.
This is really just more of a "Crap, how can I burn another 80kJ if I've only got a mile left?" Oh yeah, afterburners.
This is really just more of a "Crap, how can I burn another 80kJ if I've only got a mile left?" Oh yeah, afterburners.
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I consider it as a target for each ride I do. I set minimums for the week and for the longer rides. This is mostly about weight control/loss.
I need to see at least 3000kj on any Saturday or Sunday ride. If I am under than I will add on a bit of time until I meet that minimum. If I am spent before this I start looking at my food.
I need to see at least 3000kj on any Saturday or Sunday ride. If I am under than I will add on a bit of time until I meet that minimum. If I am spent before this I start looking at my food.
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Or french fries.
WR, I use TSS & IF as markers for a workout. I think kJ may not tell the whole story for a VO2Max workout - you probably need to DL the wattage graph to make sure it was an actual interval.
Is this really about how many calories you will let yourself chomp down @ dinner?
WR, I use TSS & IF as markers for a workout. I think kJ may not tell the whole story for a VO2Max workout - you probably need to DL the wattage graph to make sure it was an actual interval.
Is this really about how many calories you will let yourself chomp down @ dinner?
#17
Making a kilometer blurry
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Or french fries.
WR, I use TSS & IF as markers for a workout. I think kJ may not tell the whole story for a VO2Max workout - you probably need to DL the wattage graph to make sure it was an actual interval.
Is this really about how many calories you will let yourself chomp down @ dinner?
WR, I use TSS & IF as markers for a workout. I think kJ may not tell the whole story for a VO2Max workout - you probably need to DL the wattage graph to make sure it was an actual interval.
Is this really about how many calories you will let yourself chomp down @ dinner?
I really only ever target kJ on my commute, and only once or twice/week. It's nice to see that I can get over 600kJ in my round-trip commute.
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I burned 371 kJ this morning on my 6 mile commute
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#19
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Yeah, TSS & IF are great after a ride, but during the ride, kJ is right there. Also, this is a known course, it's short (6 miles), with pretty consistent winds. If a front comes through and changes the wind, I can see it in the energy spent though.
I really only ever target kJ on my commute, and only once or twice/week. It's nice to see that I can get over 600kJ in my round-trip commute.
I really only ever target kJ on my commute, and only once or twice/week. It's nice to see that I can get over 600kJ in my round-trip commute.
Those are some serious calories burned/day. Excluding your training - you're up to -3000kJ/wk!! That's like one day of food deficit!
#20
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kJ is a fairly accurate number. The estimation comes in converting kJ to Calories burned. There are about 4kJ in a kcal. Note 1kcal is equal to one dietary Calorie. The human body is about 25% efficient when burning calories aerobically. This means that the # of kJ put into your rear wheel on a ride is roughly equal to the # of Calories you used to do it.
Of course this all goes out the window if you're doing anaerobic work, but it's still fun to see.
For the record, I think anaerobic respiration is about 1/8 as efficient as aerobic, so burning 20kJ in a sprint actually uses 160 Calories.
Of course this all goes out the window if you're doing anaerobic work, but it's still fun to see.
For the record, I think anaerobic respiration is about 1/8 as efficient as aerobic, so burning 20kJ in a sprint actually uses 160 Calories.
#21
Making a kilometer blurry
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#22
Making a kilometer blurry
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To calculate, work = torque * angle moved, and those are the core measurements taken by the PowerTap hub.
#23
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I weigh 67 kilos, bike is probably 7.5-8 kilos, and the gear I was carrying is probably another 2-3 kilos.
I don't know what NP is - don't have the software to give me that at work.
Here's the ride, though:https://www.mapmyride.com/route/us/va...n/156907274627
I don't know what NP is - don't have the software to give me that at work.
Here's the ride, though:https://www.mapmyride.com/route/us/va...n/156907274627
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"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."
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"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!
#24
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kJ is a fairly accurate number. The estimation comes in converting kJ to Calories burned. There are about 4kJ in a kcal. Note 1kcal is equal to one dietary Calorie. The human body is about 25% efficient when burning calories aerobically. This means that the # of kJ put into your rear wheel on a ride is roughly equal to the # of Calories you used to do it.
Of course this all goes out the window if you're doing anaerobic work, but it's still fun to see.
For the record, I think anaerobic respiration is about 1/8 as efficient as aerobic, so burning 20kJ in a sprint actually uses 160 Calories.
Of course this all goes out the window if you're doing anaerobic work, but it's still fun to see.
For the record, I think anaerobic respiration is about 1/8 as efficient as aerobic, so burning 20kJ in a sprint actually uses 160 Calories.
#25
bzzzz
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I've been averaging 12000 - 13000 kJ/week, while riding ~14 hrs.
Unlike you, however, I don't ramp it up to make my goal, I'll just add a few minutes easy instead.