Optimal Risk

Between Xmas and New Year, I took a few days off for cross country skiing in the heart of the Bohemian Forest.
It seems that I took the optimal risk.

I am over 65 and taking this in account, I selected the right skating trails, lengths and duration. Challenging steepness, skating long and swiftly enough to have a lot of fun and add to fitness incrementally, but avoiding hazardous, exhausting actions - so I never fell down, nor suffered I from a total fatigue of joints, ...

For 40 years now, I skate as often as possible - so I have some experience in cross-country skiing risk management.

Maybe the same period the first quants have experienced quantitative financial risk management. But, how many would care about optimal risk? ;)