
Many people who were active when they were young end up inadvertently taking a long break from sport in adulthood. Perhaps you lifted weights in your teens and 20s, then had kids and didn't get back to the gym till you were in your mid-40s. Often, you’ll discover that your original strength and capacity for training returns quite quickly.
I started to think seriously about muscle memory when I was watching the film 14 Peaks about Nims Purja, the Nepali mountaineer who summited all 14 mountains over 8,000 meters in 2019. A former Ghurka and British Special Forces troop, if anyone is going to have the physical fortitude required to pull off such a stunt, it should be him.