Enable heart rate monitor for activities only

Hey, I hope separate post will bring additional attention to that. 
I beleve this opton will be very helpful for those who don't need heart rate monitor all the time. I usualy keep it disabled to save battery and avoid some irritations that happen sometimes for some people. But when I do sport activities I want heart rate monitor to be enabled, it's very annoying to go to settings every time and enable it manualy before activity. It would be perfect to have this setting per activity, but "enable during activities only" also will work. Garmin, please add this settings to next release, I believe it's should be easy to implement since there are no technical limitations, everythin in place, just couple additional flags to add to Instinct firmware. 

Thank you.