I've been told, I've read and I've experienced it.
We tend to over estimate the amount of exercise we do and the number of calories we burn, and we underestimate how much food we eat and calories we consume.
I know when I don't weigh and meaure my food, I eat too much. When I don't use my Garmin GPS on a run, I give myself a little more credit than I actually should.
I tested it today. Since I'm tracking everything while on The Biggest Loser Club program, I write down the 9 minute walk to the gym. I've been estimating that I walk a 13-14 minute mile. Hah!
I put on my Garmin and I hustled on my walk. It was actually just under 9 minutes and my pace was 15.28 min/mile. That's 48 calories burned. At least now I know and won't overestimate calories again.
How about you? Where do you fall in this spectrum...over estimate exercise or under estimate food consumption or both?