Less can be more
I spent last week with Ivan Castro, the Green Beret turned marathoner who, by the way, happens to be blind. In theory we were working on our new book - to be published next year by St. Martin's Press - but I think Ivan's real goal in having me come down was to kick my butt around the gym. He had me doing two-a-days, cardio and weights, and easily putting me to shame on both.
One thing I learned: If you ever get the opportunity to work on a Gravitron, remember that the weights are a counter-balance. In other words, twenty pounds is NOT the easy setting.
(It is a cool machine. Here's an instruction video here.)