Specific training involving 'back casting' from desired outcomes to define events and training protocols, termed the 'centenarian decathlon', is necessary for strength, health, and balance in the 'marginal decade'.

“so I have like 18 things I want to be able to do when I'm 100 if I get to be a hundred and they're all quite mundane but they're all very pragmatic and practical one of them is being able to do a 30 pound goblet squat which again I could do today blindfolded on one leg a hundred thousand times but at a hundred that's actually going to be quite a task and it's important because that replicates picking up a toddler which presumably if I'm 100 I've got great grandkids I want to be able to pick them up I want to be able to stand up off the floor using no support and only a single point of my own meaning one arm and both my legs and get up off the floor without help”