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You should be eating 1,200 + 800 = 2,000 calories per day. Eat back what you burn for exercise. If you are not eating it back, that means you are only getting 400 calories per day. You are starving. A quick google search should clear all of this up for you. Here is a start: http://en.wikipedia.org/wiki/Starvation_response
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The calculation used to calculate calories burned relies on a direct relationship between your heart rate and your oxygen intake. Thus, the heart rate monitors are assuming that you are performing aerobic cardio exercise when they make the calculation. Because circuit training is a primarily anaerobic exercise, your heart…
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A slow jog is what you want. I admit it does feel weird at first, but you should have the same form whether you are running 13 minutes per mile or 6 minutes per mile. Not being careful about form can cause injuries. So, running form is different than walking form and it uses different muscle groups in different ways. I had…
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I got one in the middle of August and it was way higher than I expected (or what Runkeeper calculated). However, this was due to running in 90 degree weather, which causes your heart rate to go higher so your body can cool itself, but not necessarily because you are burning that many more calories. Calories burned is a…
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If you can run/walk a 12 minute mile, then you can certainly run a 12-13 minute mile! That is a fine pace for someone who is starting out with running. I assume that the problem is that you get all out of breath, you legs start burning and you start to feel weak, like you can't go on. This is because you are running faster…
