He has a swing analyzer called Body Fit Golf by Mizuno, which looks like a small golf club and has a component designed by his company that detects how the wearer's muscles or joints are moving.
Gravity takes over when you perform most exercises, like a dumbbell curl or a kettle bell swing, giving the body a chance to relax, says Rowdy Yates, a certified personal trainer and fitness manager at Crunch gym in New York City.
The B-1B has a "variable-geometry" or swing-wing design: The wings are swept forwards, almost at right angles to the body, for take-off and landing and cruising.