Some surprising figures
#1
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Some surprising figures
Today I was pushing what I could manage. My wife set off for work while I set off for another town 35 miles away to pick up a couple of bits, and then came back.
Including the time I spent at the shop (which wasn't a whole lot), I covered 70 miles in 4 hours and 10 minutes. Taking out the time at the shop that probably drops to more like 4 hours, maybe 3:50. But let's run with 4:10 because I don't want to overstate stuff.
Using bikecalculator.com I entered my details - my weight of 240, I guess the bike weighs about 20, riding the hoods using clinchers, I set the gradient to 0 because although it undulated a little there were no particularly nasty climbs (the total ascent worked out something like 20 feet per mile), and the headwind to 8mph - I had something of a headwind both ways, the forecast said force 3-4, so I assumed a constant value that seemed reasonable.
According to the results it gave me I was putting out 271 watts for four hours, burning 3886 calories in the process. I find those figures surprising, I usually figure about 40 calories per mile which would land me more like 2800 calories. If I factor out the time I spent in the shop buying my stuff and drop the time to 3:50 then the power goes to 315 watts, and if I drop the headwind to 5mph it shows 257 watts for four hours.
Do these figures seem reasonable - have I got stronger than I realised?
Including the time I spent at the shop (which wasn't a whole lot), I covered 70 miles in 4 hours and 10 minutes. Taking out the time at the shop that probably drops to more like 4 hours, maybe 3:50. But let's run with 4:10 because I don't want to overstate stuff.
Using bikecalculator.com I entered my details - my weight of 240, I guess the bike weighs about 20, riding the hoods using clinchers, I set the gradient to 0 because although it undulated a little there were no particularly nasty climbs (the total ascent worked out something like 20 feet per mile), and the headwind to 8mph - I had something of a headwind both ways, the forecast said force 3-4, so I assumed a constant value that seemed reasonable.
According to the results it gave me I was putting out 271 watts for four hours, burning 3886 calories in the process. I find those figures surprising, I usually figure about 40 calories per mile which would land me more like 2800 calories. If I factor out the time I spent in the shop buying my stuff and drop the time to 3:50 then the power goes to 315 watts, and if I drop the headwind to 5mph it shows 257 watts for four hours.
Do these figures seem reasonable - have I got stronger than I realised?
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#2
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I think that the calorie burned figures are always totally inaccurate. If they were, I would've lost more weight by now!
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I always use a 35 calorie per mile figure when calculating out my rides. It keeps me honest IMO and I am not faking myself out. I do add in an extra 35 if my average speed is over 17 mph because I know I was pushing myself then.
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They have an iPhone app. I'll have to load that up when I get home today.
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