Twitter CEO Jack Dorsey has revealed he manages stress through a strict diet and exercise regimen as well as quirky lifestyle habits like hours of meditation each day.

The 42-year-old's only daily meal is dinner, but he won't eat at all on weekends, he has ditched warm showers altogether and he walks the distance between his home and the social media HQ in an effort to make sure his mind stays sharp.

Dorsey – whose net worth is $5.3billion – claims the routine makes his days feel longer and says he's able to switch off to get ample sleep every night.

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Twitter founder Jack Dorsey has revealed his extreme diet and wellness regime in a podcast

He meditates daily and has been on retreats where he meditated from 4.30am to 9pm

The tech boss, who is also the co-founder of Square, often posts moments from his day on his microblogging website profile but he shared more details 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.

Dorsey usually enjoys fish, chicken, or steak with a salad or a side of vegetables and has berries or dark chocolate for dessert.

The single man – who says he wants to have a family at some point and is trying to experiment with what has the best impact before he does - will allow himself red wine on occasion but notes it interrupts his sleep if he has too much.

But he ditches food altogether for two days of the week and reintroduces calories into his diet with bone broth to prepare for the new week.

'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 hallucinating. It was a weird state to be in. But as I did it the next two times, it just became so apparent to me how much of our days are centered around meals and how — the experience I had was when I was fasting for much longer, how time really slowed down.'

He said he eats only dinner Sunday to Thursday, usually between 6.30pm and 9pm

But Dorsey doesn't eat at all for two days of the week as part of intermittent fasting. Pictured is food he posted on Twitter January 17

In January he revealed to his follows how he ditches lunch and breakfast to get more done

He said the only supplements he takes are 'a multivitamin and a lot of vitamin C' at dinnertime and he first heard about the idea on a Wim Hof podcast two years ago.

'The time back from breakfast and lunch allowed me to focus more on what my day is,' he continued. 'I can go to bed and actually knock out in 10 minutes, if not sooner than that. It really changed how quickly I felt asleep and more so how deep I felt I was sleeping.'

Despite access to the top fitness experts being a possibility, Dorsey simply does seven minutes of exercise per day using the Seven app.

'I don't have a personal trainer. I don't go to a gym,' he admits.

But he gets additional exercise in by walking briskly for an hour and 15 minutes every day to work, allowing him to soak up some vitamin D through sun rays.

He added: 'I might look a little bit more like I'm jogging than I'm walking. It's refreshing ... It's just this one of those take-back moments where you're like, 'Wow, I'm alive!''

Dorsey walks five miles to walk. He revealed in the podcast it makes him feel 'alive'

An images shows his walk during a retreat he did last year where technology was banned

The meditation trip has inspired him to meditate for two hours each day back in California

California-based Dorsey takes Tuesdays and Thursdays to work from home so makes sure he gets in a high intensity interval workout.

Dorsey was vegan for two years but switched to the paleo diet after his mother pointed out he was turning orange from too much beta kerotine.

He's current experimentation with wellness doesn't go without some unconventional habits.

'Nothing has given me more mental confidence than being able to go straight from room temperature into the cold,' Dorsey said in the chat about starting his day with ice baths. 'Especially in the morning, going into an ice-cold tub from just being warm in bed is — it just unlocks this thing in my mind and I feel like if I can will myself to do that thing that seems so small but hurts so much, I can do nearly anything.'

Dorsey endures daily ice baths in between 15-minute sauna sessions and keeps a near-infrared light near his desk at work

Dorsey is seen above at the annual Allen & Company Sun Valley Conference on July 6, 2016

But he has made the process even more grueling over the past three years by alternating between the 37-degree chiller for three minutes and a 220-degree barrel sauna for 15 minutes, three times.

Dorsey is so convinced about the benefits that he has switched from a Clearlight sauna barrel to a portable infrared SaunaSpace tent which is said to heat the body from the inside out, compared to the reverse process that occurs in a dry sauna.

It allows for better endurance in the sauna and typically makes the user sweat more even though they don't feel as hot.

He even has a near-infrared lamp over his desk to keep the benefits going.

Dorsey has posted online about dealing with stress through Vipassana meditation during a 10-day 'retreat' where there's no reading, writing, or devices allowed.

He went to one in Texas this year and one in Myanmar last year, getting through a stretch of no talking, no eye contact, 4am rises and two vegetarian meals a day before noon only.

The technology enthusiast often spent 4.30am to 9pm meditating.

But Dorsey work two days each week from his home and adds a HIIT workout to his routine

He doesn't have a personal trainer and does seven-minute workouts on the Seven app

'I've more or less kept up the practice of two hours ... a day,' he said about life back in Silicon Valley. 'If you can just get 10 minutes, and sometimes that's all I can find, that's what I do.'

It has taught him to switch off his mind with ease and he tracks his sleep pattern periods with an Oura Ring.

'If I keep to a consistent schedule of sleep, I get higher scores on REM and I get much deeper sleep as well,' he claimed.

But the Twitter co-founder is still attached to his phone and uses his device as part of the winding down process of journaling.

He simply jots down things of importance in his iPhone Notes app.

'I try to do that every single day, usually when I'm wrapping up the day,' Dorsey admitted. 'It's searchable. It's accessible all the time. It's in the cloud, so I can get to it even if I don't have my phone. It's secure.'

Billionaire Dorsey journals using the Notes app on his iPhone, helping him stay organized