Excellent piece here by Nassim Taleb - Why I do all this Walking, or How Systems become Fragile
This is another application of the barbell strategy: plenty of idleness, some high intensity. The data shows that long, very long walks combined with high intensity exercise outperforms just running.
After my Aha! flash, under guidance from Art de Vany, I embarked on an Extremistan barbell lifestyle: long, very long, slow meditative (or conversational) walks in a stimulating urban setting, but with occasional (and random) very short sprints, making myself angry imagining I were chasing the bankster Robert Rubin with a big stick trying to catch him to bring him to human justice. I went to the weight lifting rooms in a random way for a completely stochastic workout --typically in a hotel when I was on the road.
Like the Grey Swan event, these were very, very rare, but highly consequential weight lifting periods, after a day of semi- starvation, leaving me completely exhausted, then I would be totally sedentary for weeks and hang around cafés. Even the duration of the workouts remained random --but most often very short, less than fifteen minutes.
hat tip to Seth