Twitter CEO, Jack Dorsey , has opened up about how he stays healthy and manages his stress through a strict diet. The 42-year old whose net worth is $5.3billion eats only once a day, fasts on weekends, walk five miles to work, and all these are done after having three ice baths and meditating first. The tech boss, who is also the co-founder of Square revealed all these in a March 15 podcast with Ben Greenfield Fitness. 'During the day, I feel so much more focused. ... You have this very focused point of mind in terms of this drive,' Dorsey said about having his only meal between 6.30pm and 9pm. 'I'll go from Friday 'til Sunday. I won't have dinner on Friday. I won't have dinner or any meal on Saturday. And the first time I'll eat will be Sunday evening. I've done that three times now where I do [an] extended fast where I'm just drinking water,' Dorsey revealed. 'The first time I did it, like day three, I felt like I was ha...