Spark's figures for elliptical ARE insanely high. Notice that you don't get to enter speed or resistance. It may have been calculated based on some person doing very high level work.
Use the lower figure, or buy and wear a heart rate monitor.
Fitness Minutes: (12,716)
8,267 4/20/12 2:20 P
Cardio machines are notoriously off (As much as 30%!) ; the only way to get an even close-to-accurate number is with a heart rate monitor (with a chest strap.) It's still just an estimate, of course, since the only way to be truly accurate is in a lab, but it's about the best we non-scientist types can get. ;)
When I have multiple numbers and I'm not sure which one is right, I either take the lower number, or split the difference. I'd rather underestimate than overestimate.
Fitness Minutes: (9,767)
399 4/20/12 1:16 P
I've seen it as much as 50% off. I wear a heart rate monitor and the numbers never match any of the machines. In about an hour of exercise, the max I get is 600. But I'm about ready to have a heart attack.
Fitness Minutes: (19,367)
1,029 4/20/12 12:28 P
I have wondered that too. When I log my elliptical workout on SP it says I burn about 100 calories more than the elliptical says. But I weigh more than you do. And I too, go a pretty fast pace. But I know that all this is a "guess" anyways so I try to only use it as a guide.
Fitness Minutes: (17,032)
1,636 4/20/12 12:01 P
I feel like spark people's estimate for how many calories I burned on the eliptical trainer was really high (something like 175 for 15 minutes). I'm 177lbs. Does that sound reasonable at all? I mean, I was breathing heavy and was sweating a little at the end but it was only 15 minutes at about 4.5mph. Does anybody else find that tracker to be crazy high?
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