I have instrumented myself up pretty extensively over the last few years. I ran a bunch of marathons (until I got hurt) and used a Garmin GPS & HRM as well as a Polar HRM to measure calories, miles, etc.
I now use the bodymedia fit core as well.
Bottom line is that most of these devices are within about 10-15% of each other (They are a lot more accurate though than treadmills/ellipticals, etc.)
But I have recently become convinced that the straight up math of calories in vs calories out is not really that accurate. We'd like to think that if we burn more calories than we eat that we'll lose weight. I think chemistry and composition of calories is more important (eg carbs/proteins/fats) and has a factor in your body chemistry equilibrium.
I don't want to geek out on chemistry on the message boards here, but since cutting down on carbs, I've lost weight and inches even though I am eating more calories.....go figure!
I'd recommend reading "Why we get fat" and "The Art and Science of Low Carbohydrate Performance"
Whether you think that you can, or that you can't, you are usually right! Henry Ford
You won’t always be the strongest or the fastest, but you can be the toughest.
| current weight: 194.0