It was pretty extensive - we worked out 8 hours a day, 5 days a week, for 3 months, which I think is more than anybody in the Olympics. I thought well I don't need this, the girls need it, but it was a gift.
“I must confess that, at that time, I had absolutely no knowledge of the slowness of the relaxation processes in the ground state, processes which take place in collisions with the wall or with the molecules of a foreign gas.”