This doesn’t directly answer your question, but I recently got back from Mt. Vinson. I also bought and used the 24 week training plan. I did the plan 95% as it’s written. I live in Kentucky and did almost all of my hill sessions on a treadmill, and ME work-outs on a stair machine. Although it was not a terribly difficult climb, my conditioning felt by far the best it ever has on the mountain. The 24 week plan works…and that zone 1 and 2 stuff does too! 🙂