I used to work for an organisation led by ex special forces.
We were setting up some corporate team work challenges, and I was struggling to climb about 12-15′ up a tree to attach a rope. One of the guys offered me a stand on his shoulders. I’m 6′ and 14st – he just cold stood up with me on shoulders…. Then ran back from Borrowdale to Keswick because he ‘needed the air’, in walking boots…
Same chap a day later at midnight managed to get within 10m of me in a pitch black, steep forest side in which I was hiding… He let me know he was there by flashing his watch light at me…
Amazing skills and physicality in which he took great satisfaction from practicing and maintaining, and still does, even at retirement age…