according to @lancearmstrong -- kona has 11 of 13 climate zones. this is the rain forest one. #stunning

feeling very inspired here in #kona #cnnfitnation

had a great time in toronto with @strombo -- watch cbc tv 11p tonite

in la today at warner bros -- trying to create a more fit nation. thanks for the welcome!

today nytimes crossword puzzle. I want to make 40 across easy for you. take a look!

having fun writing my @umich commencement speech. @barackobama is a tough act to follow! any ideas?

about to walk out on the stage at upenn to give a talk. after all these years, I still get the jitters...

spending the day in north philly. helping @foodtrust with an urban garden. the cure for food deserts?

surrounded by men of comedy & making will ferrell laugh! on @conanobrien

check out the picture of my parents and their new favorite son, @andersoncooper

shooting a tv pilot based on #MondayMornings. check out our name plates...

about to chat w/ my old friend @GeorgeStephanopoulos on @GMA #mondaymornings

now that #mondaymornings is done, I get to spend more time with my gupta gals...

with @yvesbehar trying out his new urban bike. 1 exp of the right design in the right setting. @cnnthenextlist 2p est today.

starting an open water swim! any triathletes out there. #TriWithMe

taping with @kylemaynard. what an amazing guy. quadruple amputee, and... mountain climber!? watch #SGMD 730a sat/sun

#medmystery. this is what can happen when the neck flexes during a car accident -- guesses?

fascinating day at MIT media lab. that's prof hugh herr. we talked bionics! @cnnthenextlist

a very busy week -- @daniellecnn takes 1 for the team! #BigHits Sunday 8p. #CNN

Check out The Rampants of JH Rose. Big Hits, Broken Dreams. Sunday, 8p #CNN #BigHits