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Cycling to running miles conversion

Old 02-06-24, 05:12 PM
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Cycling to running miles conversion

How many miles cycled do you think it takes to equal 1 mile ran? In terms of difficulty, workout, time elapsed, or however you wish to compare. I think maybe 8 miles cycled = 1 mile on foot
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Old 02-06-24, 05:15 PM
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Originally Posted by LarrySellerz
How many miles cycled do you think it takes to equal 1 mile ran?
4.62197.

Anyone who says otherwise is wrong.
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Old 02-06-24, 05:21 PM
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N * sin (2 π t) *exp (- Ķ t) / sqrt (1 + t^2)

where t is the effective time, Ķ is Moehper's coefficient, and N is the meteorological distance. But it's only an approximation, good to 0.1% at best.
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Old 02-06-24, 05:33 PM
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How does a marathon compare to a 100 mile bike ride in your book?
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Old 02-06-24, 05:39 PM
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Well if you run at 6 mph and ride at 18 mph then it is about a 3:1 ratio in distance. But in terms of energy used I would think the ratio is considerably higher. I can comfortably ride 100 miles at 18 mph, but I certainly canít run 33 miles at 6 mph. I donít do running, but Strava would probably provide a ballpark energy consumption per mile, which you could compare with your cycling consumption.
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Old 02-06-24, 05:48 PM
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Originally Posted by ScottCommutes
How does a marathon compare to a 100 mile bike ride in your book?
For me as a cyclist who doesnít run, a marathon would be a LOT harder. But a lot depends on how fast you ride. Running has a much higher minimum energy demand than cycling unless you are climbing a steep hill. Riding 100 miles on the flat at say a leisurely 12 mph is not very challenging. But at 20+ mph it becomes a lot harder. Running a marathon is hard work at pretty much any speed above walking pace.

Last edited by PeteHski; 02-07-24 at 08:25 AM.
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Old 02-06-24, 05:57 PM
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Purely unscientific, but I've done 1 century and 3 marathons. How I felt after the century and the marathons was similar. I've done many half marathons and while I've never gave it much thought, I guess I guesstimate a half to be about 55 or so miles on the bike. One thing that is common to all those activities is I usually enjoy a beer afterwards.
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Old 02-06-24, 06:03 PM
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Originally Posted by Camilo
They're not comparable. Running is a high impact sport, cycling is low impact. They use and abuse different muscles.
No, this is Larry asking -- cycling is a high impact sport for him.
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Old 02-06-24, 06:09 PM
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I cycle 19 miles to work every day in a little under 1:40, including traffic and stop lights and such. An elite marathoner can do 26 miles in a hair under 2:00. It burns me up a little inside that there are people who could beat me to 19 miles without a bike.
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Old 02-06-24, 06:22 PM
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There is no comparison.
Wait, there is. It's just that time, miles, and speed fail to really capture it well and the results are so easily skewed so as to be effectively meaningless.

Running is harder. The minimum energy expenditure to run, not jog, but run is much higher than sitting on a bike. Something on the order of 100-120-ish calories per mile. To "run" a mile with reasonable enough form to actually be "running" takes ~8 minutes or so at the slowest possible pace. An hour would take you 7.5 miles and about 750-900 calories.

The same number of calories expended on a bike might very well be a personal time trial of 30+ mph average speed for an hour. Impossible. A more reasonable 18-20 mph speed is (off the cuff) ~8 calories per minute equals a depressingly low 480 calories per hour. It would take about 1 hour 45 to 2 hours of reasonably high effort cycling to equal runnings 750-900 calorie expenditure. So...36-40 high effort cycling miles in 2x the time running takes to do 7.5 miles. 40 miles in 2 hours is awfully fast.

All variable and subject to externalities, of course.

I've been told that a 4 hour marathon (slow) is about equivalent to a double century. I don't know if that is true or not. The math suggests 3500-4000 calories to do a marathon depending on fitness. Personal experience of ~7500 calories measured for a double century in 3-4x the time is close enough to be plausible from an "effort x time" perspective.

Useful? I'm not sure.

Last edited by base2; 02-06-24 at 06:31 PM.
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Old 02-06-24, 06:42 PM
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Originally Posted by LarrySellerz
How many miles cycled do you think it takes to equal 1 mile ran? In terms of difficulty, workout, time elapsed, or however you wish to compare. I think maybe 8 miles cycled = 1 mile on foot
In terms of difficulty: 20 miles cycling is 1 mile running.(but you still won't hurt as bad by cycling) Aand why in hell would you run?

Last edited by Bleu; 02-06-24 at 06:48 PM.
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Old 02-06-24, 06:46 PM
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I avoid running (not a fan)but I'll cycle for miles/hours. However, I'll skate for hours....does that count.
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Old 02-06-24, 06:48 PM
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A lot depends on whether you are going downhill.

John
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Old 02-06-24, 06:51 PM
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I'd say the best way to find out is to go to the local HS/MS track........and run a mile or two. That should give you a starting point. I've ran 18 marathons since 2013. Let me think about it and get back to you.
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Old 02-06-24, 07:31 PM
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Some estimates from the science folks, for a 150 lb. person:

Running at a 6 min/mile pace consumes 1145 Calories per hour, and the runner covers 10 miles. 1145 Calories / 10 miles = 115 Calories/mile

Cycling at 20+ mph consumes 1145 Calories per hour, and the cyclists covers 20 miles. 1145 Calories / 20 miles = 57 Calories/mile

Cycling at 20+ mph is metabolically just as "hard" as running a 6 min/mile pace, but cycling gets you twice as far.
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Old 02-06-24, 08:02 PM
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Originally Posted by ScottCommutes
How does a marathon compare to a 100 mile bike ride in your book?
I've done both and I assure you it is much easier to cycle 100 miles than to run 26. I've completed five marathons, all between the ages of 38-40, and four centuries, all in my 70s. It took me several weeks to recover from each marathon. After my centuries, I was cycling as usual the next day.
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Old 02-06-24, 08:22 PM
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Iím going to go out on a limb and say 1. After all, a ton of feathers weighs as much as a ton of bricks.
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Old 02-06-24, 08:56 PM
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I've been using the imperial system of measurement for quite some time now, this is the first time I've heard there are bicycle and running miles. I'm curious how these compare to a standard mile, i.e. 5280'?
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Old 02-06-24, 09:28 PM
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Originally Posted by koyote
4.62197.

Anyone who says otherwise is wrong.
3.14159...
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Old 02-06-24, 09:31 PM
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Originally Posted by terrymorse
Some estimates from the science folks, for a 150 lb. person:

Running at a 6 min/mile pace consumes 1145 Calories per hour, and the runner covers 10 miles. 1145 Calories / 10 miles = 115 Calories/mile

Cycling at 20+ mph consumes 1145 Calories per hour, and the cyclists covers 20 miles. 1145 Calories / 20 miles = 57 Calories/mile

Cycling at 20+ mph is metabolically just as "hard" as running a 6 min/mile pace, but cycling gets you twice as far.
Now calculate aerobics.
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Old 02-06-24, 11:21 PM
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Originally Posted by terrymorse
Some estimates from the science folks, for a 150 lb. person:

Running at a 6 min/mile pace consumes 1145 Calories per hour, and the runner covers 10 miles. 1145 Calories / 10 miles = 115 Calories/mile

Cycling at 20+ mph consumes 1145 Calories per hour, and the cyclists covers 20 miles. 1145 Calories / 20 miles = 57 Calories/mile

Cycling at 20+ mph is metabolically just as "hard" as running a 6 min/mile pace, but cycling gets you twice as far.
My running chart says a six minute mile pace takes 4.75W/kg. At 80 kg that puts me at 380W. Does it really take me 380W to cycle 20 mph? Iíd think that would get me well into the 20s. Omnicalculator estimates 380W on a road bike gets me to 26mph on the hoods. 20mph only requires 190W which corresponds to a 12 minute pace. The nonlinearity of cycling load means the mileage equivalence will vary a lot based on speed.

Otto

Last edited by ofajen; 02-06-24 at 11:35 PM.
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Old 02-07-24, 01:35 AM
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Offhand, Id say gearing on a bicycle would be the major variable.
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Old 02-07-24, 03:36 AM
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Originally Posted by ScottCommutes
How does a marathon compare to a 100 mile bike ride in your book?
One is about 74 miles longer (in distance) than the other.
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Old 02-07-24, 05:44 AM
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Riding a century is far easier than running a marathon. Anybody in good shape can ride a century every day forever.

The record for daily cycling is 240 miles every day for an entire year straight. Running a marathon every day for a year has been done but it's on a whole other level. Let alone 2.4 times that distance.
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Old 02-07-24, 07:05 AM
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Originally Posted by Outrider1
Offhand, Id say gearing on a bicycle would be the major variable.
This. riding a single speed would make it closer to cycling.
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