Right now the closest thing to a ruck activity is the hike activity. That works for now, but you have to manually comment on how much weight you carry. The ruck activity could include heartrate, elevation climbed, weight in rucksack, weight on vest, calories burned, distance, step count, average pace, or average time. You could also add a segment option, in case I wanted to run a half mile to warmup before I start rucking with the weight. There could also be an option for rucking on the treadmill that could include all those things along with the mph and grade of incline.