Walking in the Zoo

You could log it as slow walking for half the time you are there? So if you are there from 12-4 you log two hours of slow walking?

Or, depending on how frequently you volunteer, you could just up your activity level?

I use an application called runkeeper for this kind of activity. It is a phone app that tracks speed and altitude changes too. It has an option to auto stop when you stop moving so it works great for this. Also, it tracks calories based on the weight you enter into the app. Good luck and have fun. I would love to volunteer at the zoo, I love animals.

I wouldn't log it as exercise. I'd alter my activity level to adjust for it, from sedentary if that's where you have it to lightly active.

However, a Fitbit would be a good device to get to help you determine what your activity level is on days when you walk a lot. You can get the Zip for $49. It's fun

I walk the zoo and the mall a lot. I log it as exercise. I use a pedometer. I find the total distance I walked, and typically divide by 2.5 mph to get the total time spent walking.

There are tons of pedometer-type apps. Some use GPS, some don't. I use Runtastic Pedometer when I'm indoors and/or don't want to drain my battery excessively. I like the regular Runtastic app if I'm outside and I want accurate GPS data. Both of those apps link up with My Fitness Pal. But honestly, I don't like the way they calculate calories, so I use the procedure I mentioned above for logging my exercise.

A cheap pedometer may help you, it doesn't have to be a fancy one. Then based on the activity levels below you can adjust your MFP settings:

Daily step count:
<5000 Sedentary
5000 - 9999 Lightly active
10000 - 14999 Active
>15000 Very active

I wouldn't log it as exercise. I'd alter my activity level to adjust for it, from sedentary if that's where you have it to lightly active.

However, a Fitbit would be a good device to get to help you determine what your activity level is on days when you walk a lot. You can get the Zip for $49. It's fun

I agree, I also have a Fitbit, Zip which calculates your steps, calories burned & distance. I also have a ultra, which I can't find at the moment, this calculates steps, calories burned, distance, sleep & stairs climbed. It's the best way to keep track of your walking & it will link with My Fitness Pal to show added calories or if you haven't walked a decrease in calories.