Thank you for opening my eyes to what has been for me a new way of training. I’ve always struggled to keep up with my friends in the mountains. But for the last 8 months I’ve been training with a couple of your training plans. Now the friends I gasped to keep up with are gasping to keep up with me and I’m barely breathing hard when we’re out climbing together. What was once a 4 hour day hike to Camp Muir is now well under a 2 hour trip and I felt like I just got warmed up when I arrive to Muir. So I hope this finds you well and again thanks for helping me to reinvent my climbing. Cheers!