Fenix 7 making Trail Run act like Ruck?

Are you planning to really run on trails? Because I've found the power numbers to be unreliable in trail running (and switched power off in that activity). The varying terrain and body movements makes it impossible to estimate power properly. So the numbers could be off even if you were able to include the ruck weight...

(Of course what people count as "trails" varies a lot, so power could well work in some cases.)

Bitti - thank you for the response.  Given my location, I generally ruck on pavement with only about 10% of my time ever on trails which leads me to believe the general stats it generates are "accurate" to some degree.  Trail Run generates a lot more data than "Hike" (including a VO2Max estimate) which I find useful for tracking over time but Trail Run is not really the same a rucking due to most actual trail runners not throwing 50 pounds on their back.  I'm just trying to find a way to get the watch to track what I'm actually doing rather than what it thinks I am doing.

Cheers!

If you are going after a rucking VO2max estimate with extra weight, I'm not too optimistic about that. The VO2max estimate is based on your HR / pace ratio (with lots of additional analysis). Having additional weight will definitely change that ratio, and I don't believe changing your weight on the watch would have the desired effect (it's probably different to have more body weight than external dead weight).

But running/walking with extra weight definitely improves your VO2max, so I would do rucking using hiking (or trail running with VO2max estimate switched off), and then do normal runs regularly to see the effect rucking has had on the VO2max (or normal walks if you don't run). The calorie estimate during rucking should be fairly ok, since the extra weight increases your HR (which is used to calculate calorie consumption).

But in fairness, what do I know, I've never done "rucking". I've done lots of multi-day hikes with a 35-55 pound backpack while wearing my Garmin, but I've not tried to get a VO2max estimate (which is futile in a forest, anyway).

Bitti - thank you for your insight.  I will try that!