Sorry to be so dense but I still want to make aure I’m clear on this. Sounds like it’s just based on total gain, not change? You’re use of the word gain with roundtrip and ascent and descent from an earlier reply is throwing me off. I’ll give a specific example from last sunday. I did a big mountain “run” that was basically one big uphill, 5,000ft ascent, and then back down the same route so 5,000ft descent. All with a very light pack. Nice little out n back here in the Tetons. How would you adjust the TSS? Intuitively I’m thinking the downhill change needs to be part of the adjustment since it’s so hard on the body…