Hiking metric - pack weight variable

Is there any way to configure hiking activities to include pack weight in the caloric expenditure and other health metrics? This is an important consideration for me when calculating how many calories I need to be taking in over the course of a long day on the trail or pitch in order to compensate for calories expended throughout my hikes/climbs.

I know that I can change my global weight prior to an activity but it makes more sense to have this feature included in the hike activity (and others as applicable where pack weight it involved).  Similar to how the Indoor Bike activity uses wheel size it seems logical to include pack weight in Hike.  This is a critical metric for us hikers/climbers who are spending very long hours with constant loads on our backs.