
Applying training practices from other endurance sports, the authors demonstrate that following a carefully designed regimen is as effective for alpinism as it is for any other endurance sport and leads to better performance. They deliver detailed instruction on how to plan and execute training tailored to your individual circumstances, translating training theory into practice to allow you to coach yourself to any mountaineering goal.--Publisher.
Climbing was recommended here, and I think that's a great idea. Hiking is usually a better idea for those just starting out though.
Look into Training for the New Alpinism and Training for the Uphill Athlete. The core tenets of these are Injury Prevention and Endurance training, not pure strength. This is remarkably similar to how special forces train. The basic idea is that you do a long, easy introduction, then strength building, then endurance. This is a 6-12 month cycle with a goal you target at the end. Workouts are made up of some long, low effort (Zone 1, so you barely feel winded) workouts that end up being walks for those out of shape, and one high effort jog/run type workout, with a couple strength days a week. None of this should be difficult; it's the volume that makes it so. One critical note: your cardio can be whatever aims towards your goal, whether that's running, rucking (hiking with weight on), swimming, biking, etc.
I'm actually preparing to start a cycle myself after some life events. I'm by no means an expert, but this system has worked for me.
Here's a training spreadsheet; feel free to copy it. I got it off of a forum a while back, so I can't easily give credit, but I did not make it so I can't take credit.
https://docs.google.com/spreadsheets/d/1zlIF6sCvO4je1YfXohIF...
I use TrainingPeaks to track my actual data and have found that being able to parse my own data and do analysis has helped immensely. Also, Garmin Running Dynamics changed my running for the better, once I knew what the heck to DO with the data.
I really can't recommend "Training For the New Alpinism" enough. It really disabused me of that notion, and after a year or two of conscientious work I can hike the same trails with a smile & easy breathing, faster than I once could dripping sweat & suffering.
A sport heart rate monitor is also extremely valuable.
From what I understand going more in depth requires either maxing out your HR (Steve House describes how you can do this in Training for the New Alpinism - basically sprinting uphill until you collapse, seems really unpleasant) or doing lactate testing in a lab.
I follow TFTNA (Training for the New Alpinism) and Uphill Athlete (Steve/Scott's new book) training regiments that Parent mentions.
They do talk about retooling your body to use fat reserves more than carbs. While I'm sure the evidence shows that keto diet might make this switch faster and easier, someone on a non-keto diet (carb based) can also do this.
