You really need accurate, granular data on your unique situation. You need to be more smart than "tough". And you won't find that information on a forum group.
For starters:
- Find a PhD level PT who works with outdoor athletes. If you are in places like Metro Seattle, Boulder, Durango, Park City it is easy peasy. If not, many will work with you remotely via Zoom. They will identify macro issues with your structure via FMS eval, and plot a course for you.
- Instruction: If you are gassed after skiing (unless you are climbing), and of decent physical shape, you are probably inefficient in your movement patterns. Seek out a credentialed mentor who will drill efficiencies. You will thank me in 20 years. Far less wear and tear on your body. Far more stoke.
- Get real diet advise via a blood draw service like InsideTracker. For $600, they will measure 41 markers, and suggest very precise dietary recommendations based on your physiology and chemistry. You can even drill down into the peer reviewed, scientific journals to see the research on the recommendation. As a bonus, if you have a physical planned with your physician, InsideTracker will likely also satisfy that requirement. And you realize much more complete, actionable data.
- Optimize hormones through a service, again, based on blood draws and under a doctor's guidance. TrumanRX provides this service, and so much more. It is a complete telemed service - remote blood draw, telemd with a physician, TRT cream sent to you via FedEx. Full disclosure: I am an angel investor in this company.
You will find that the more granular the info, the more dedication that you put into "go time". Instead of piecing shit together that is found on YouTube, you will have the best Source of the Truth, and can move forward with complete confidence. If you don't, that is on you.