confused over exercise calorie burn

GC2B
GC2B Posts: 168 Member
I've just done 20 minutes on my xbox your shape, got a sweat up and the counter says 38cals burned.
On mfp 20 minutes of general aerobics is 140cals
that's a big difference in my eyes
What should I log it as?
I dont want to eat the calories back today so i'm not worried in that respect just dont want to kid myself