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					Originally Posted by photon  The only thing with 20 minutes walking for me is Circle K, which I guess would partially offset the negative of visiting Circle K, but probably better not to go to Circle K to begin with.
 I tell myself I'll only get some beef jerky but somehow I always end up with ice cream sandwiches.
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A watch would tell you how many active calories you burned in that 20mins of walking to see if it is a net negative or positive for the calories consumed / burned. 
It helped me gain insight to how much a certain 'activity' actually means in burned calories and helps me adjust my diet / activity levels