I made 23,287 steps today. I pushed myself too much yet another time. My right leg definitely hurts when I place weight on it. First the left leg, and now the right leg. I need to slow down and work up to these goals. Instead I just make myself do it now. Immediate gratification I suppose. I averaged 133 bpm, so it was a mild cardio workout. I have walked about ten miles. I burned 1064 calories through exercise. This makes for a target of 3154 calories. I have consumed 3125 calories. I had to order a Big Mac and their medium chocolate shake to get it this high.

I have done some research on the accuracy of calories burned. One way is to note speed and distance. This can be off as much as 60%. Then there is heart rate based calculations with proprietary algorithms. I believe this can be off by up to 25%. BTW Just because a watch has a heart monitor does not mean it uses it for its calories burned calculation. Then there is the the patented FirstBeat algorithms which provide the best accuracy with only 7% to 10% of an error. This software technology is being implemented by both FitBit and Garmin on their newer watches. As an example, my Garmin wristwatch apparently underestimates the calories burned according to a study. So this means my calories burned from the watch stated above can be 106 calories more, which means 3260 calories for my target instead of 3154 calories. I can live with this amount of error.

BTW FirstBeat uses average and resting heart rate, BMI, the individuals normal activity level, heart rate zones, and I think both pace and time. However, this requires a accurate heart rate sensor. A chest strap is required. The variation between each heart beat is also used to determine how much actual effort is being expended. Note that heart rate itself does not provide this information.