Fitness & Exercise

7:30 PM PT -- A rep for Floyd Mayweather wants to make it clear that the boxer has NO affiliation with "The Mayweather Experience."

The workouts do go down at Mayweather's gym ... but the rep says Floyd makes no money off the camp, and has absolutely no involvement in its operation.

Floyd Mayweather's private Vegas boxing gym has opened its doors for normies -- like you -- to train with Floyd's REAL boxing team ... but it ain't for the poor.

It's called "The Mayweather Experience" -- and for $650 a pop, regular people will get their hands wrapped by Floyd's guys, step into Floyd's ring and hit the mitts with Floyd's dad, Mayweather Sr.

It's essentially a 2-hour fantasy camp for Mayweather-aholics to see if they can make it through TBE's legendary grueling workouts.

Got rich friends? Mayweather's gym is offering training camp packages for groups -- a 6-some will run you $3,500.

We're told Floyd's team has been offering the workout for about a month so far and it's been going great.

Not too late for Conor to sign up ...

Beast Mode ain't playing around about this NFL comeback -- running crazy footwork drills IN THE SAND with a legendary footspeed specialist ... and it's scary good.

Marshawn Lynch hit the beach with Luis Badillo Jr. -- who's said to have the fastest feet in the world. He's trained world class athletes like Cristiano Ronaldo, Asafa Powell and tons of NFL players.

This time, he flew up to the Bay Area to put in some work with the Oakland Raiders star -- and it's clear these dudes ain't messin' around.

Floyd Mayweather admits he's not the same dominating boxer he was 20 years ago -- or even 5 years ago -- but he's still gonna beat that ass.

The 40-year-old boxer hit the gym Wednesday night to put in some more training time for Conor McGregor -- and posted video of his workout.

He included the caption, "I know I'm not the same fighter I was 20 years ago, I'm not the same fighter I was 10 years ago... As a matter of fact, I'm not the same fighter I was 5 years ago."

"I'm just an old legend putting in work in 16 oz gloves."

Floyd has broken down the shift in his fighting style for TMZ Sports before -- and says he went from knockout artist to defensive-minded boxer to protect his hands.

It worked.

Arnold Schwarzenegger's son has his priorities straight ... hit the gym before ya talk Hollywood!

Joseph Baena was out Wednesday in Malibu -- near his Pepperdine campus -- when our photog wanted to know if he'd follow in his father's footsteps. Our guy even tossed up a softball: if he could reboot one of his dad's old movies, which one would it be?

Gotta hand it to Joseph ... for not only entertaining the question but also sticking to what's working for him -- pumping iron like his pops.

Joseph also gets in plenty of cardio with his bros ... Pepperdine style, of course.

Some people eat tubs of ice cream after a break-up but Gregg Sulkin's therapy seems to be planks and pull-ups, which he did Thursday morning at an L.A. park ... with impressive results.

To be fair, the "Teen Wolf" star and Bella Thorne split last summer. It looked like they were back on after her botched trip to Cannes with Scott Disick, but it appears she went crawling back to the Lord.

As for Gregg, he should have zero problems finding a new chick with those abs, arms, pecs, smile ... you get the picture.

French fitness blogger Rebecca Burger died after a whipped cream can exploded onto her chest ... according to her family.

Rebecca, who was popular on Instagram, was killed last weekend in a totally bizarre accident. Her family says the pressurized canister blew up, hit her chest and triggered a heart attack.

The hit reportedly sent her into cardiac arrest, which ultimately led to her death.

The family also posted a pic of a whipped cream canister with a warning about using similar products. They claim "thousands" of defective ones are still in circulation.

Rebecca was 33.

Michelle Obama is continuing to move her body even after leaving the White House, and it looks like these days she could take anyone down in arm wrestling.

The former First Lady posted a series of pics from a boot camp over the weekend in Washington D.C. where she and Barack have been living since leaving the White House.

Michelle says the intense workout session is a tradition she started while in the White House and looks like it's still going strong, especially when it comes to her upper body.

One thing's for sure, Michelle and Barack are looking better than ever since leaving the White House.

Accused NSA leaker Reality Winner doesn't have access to her CrossFit gym behind bars, but that's not stopping her from putting the prison yard to good use.

Winner, in her orange jumpsuit, got in a workout Monday behind the barbed-wire fencing at the Lincoln County Jail in Georgia. She ran laps and did yoga stretches... including a handstand up against the wall.

As we reported ... Reality was a big-time fitness junkie who competed in CrossFit tournaments at her gym.

The judge denied her bail last week after she pleaded not guilty to charges she leaked classified NSA intel to a news site.

Ronda Rousey busted her ass this weekend -- pounding the sand at the dunes in Malibu in a crazy workout session.

Question is ... is this comeback training or is she just staying in shape?

Ronda is currently taping "Battle of the Network Stars" (she's one of the team leaders) and part of her job is navigating the obstacle course. We saw her run the course last week -- she looked pretty good.

But now, with the UFC legend running the insanely challenging dunes at Malibu ... ya gotta wonder if there's even the slightest chance she's trying to get back into fighting shape.

Chad Johnson needs to learn who to pick a fight with -- and it's clearly not his 12-year-old track star daughter Cha'iel ... 'cause here's video of the tyke straight putting hands on her old man.

Chad and Cha'iel train together a lot -- like we said she's a lightning fast track prodigy -- and this time they took it to the ring to get a little boxing cardio in.

Bad move, Chad ... check out the video of the younger Johnson stalking her pop like a kid who's been denied their allowance, cutting off the ring and dishing out punishment like a pint-sized GGG.

Ronda Rousey has already mastered the "Battle of the Network Stars" obstacle course -- but her friends ... well, they BOTH ended up in the water pit during a test run on the L.A. set.

TMZ Sports has footage of the UFC legend coaching her mom and sister as they tried to navigate everything from the rope swing to the monkey bars.

Ronda easily conquered the obstacles at Pepperdine University -- her fam had a much tougher go. Fortunately, Ronda was there to pull 'em BOTH out of the water.

Ronda is a permanent "team captain" on the show -- and every week, she'll lead a squad against DeMarcus Ware's team.

No word on how the contestants will be. Hopefully, they're practicing their rope swings.

Reality Winner -- the 25-year-old federal contractor accused of leaking a classified document -- is a committed CrossFit competitor.

Winner was an animal at the gym, sometimes working out 5 times a week at Epic Ultimate Results in Augusta, GA. She even competed in the 2016 CrossFit Games Southeast regionals.

Members say they knew Winner was in the Air Force but she was vague about what she did. She was not an extrovert ... she'd say hi to folks inside, but it was all about lifting.

She was an advanced CrossFitter ... the owner says she could dead lift heavy weights.

As for whether Winner is welcome back, co-owner Glen Whelan says if she's released from custody she's welcome. As he puts it, "Until proven guilty she's not a leper."

Winner's accused of leaking a National Security Agency doc detailing Russian efforts to hack the U.S. voting system a week before the 2016 presidential election. She allegedly leaked the sensitive information to the online news outlet The Intercept.

The CrossFit franchise has gotten some backlash ... someone posted a question on its Facebook page  ... whether the gym is an ISIS training camp.

T.I. finally witnessed the showdown that's been building for weeks -- between 2 of his homies -- and it left him laughing his ass off!!

The rapper was leaving Crustacean Sunday in Bev Hills when his crew decided it was time to settle a dispute -- who's the fastest man alive? On tour ... on that particular day ... with T.I.?

Tip -- who's in the middle of his Hustle Gang Tour -- picked the winner, and also worked traffic control. They raced in the middle of the street, after all.

All fans of the maximus that is gluteus, listen up -- one of the best butts in the world is about to pick the best butt in sports.

We got Jen Selter, the Instagram model that has turned her butt into big business (11 million Instagram followers) and asked her to weigh in on pro athlete ass.

Her choice was one of the usual suspects ... and definitely a Hall of Fame rear ... but things got really interesting when we asked who had the better rumpasauras outta Tom Brady & LeBron James.

We're sure you guys care about all that ... but in case you don't, there's a gallery of Jen below. You're welcome.

Get the ice ready, 'cause the Lakers' new strength and conditioning director, Gunnar Peterson, says he ain't playing around when it comes to getting the squad in championship shape.

Peterson -- who trained the Kardashians, Magic Johnson and some of the biggest stars in the world -- tells TMZ Sports he plans on making an immediate impact with his customized gym plan.

"The new Lakers will be very different from what people are expecting."

He also has BIG hopes for Lakers star Brandon Ingram -- saying he's followed BG's career from Duke and claims the guy is a "special athlete."

"I'm gonna make sure he upholds the standard that I know he's capable of."

Jason Momoa gave one hell of a sendoff to his UFC pal Mark Hunt by performing a haka dance ... shirts off, tongues out and all.

We're told Mark and Jason struck up a friendship over the last 6 weeks while they were both in Australia -- Mark training for his fight against Derrick Lewis, and Jason filming for "Aquaman." They've been working out at the same gym called Heartbreak.

As a good luck gesture for Mark's fight next month in New Zealand, Jason -- as well as cast and crew and some of Hunt's training partners -- performed that country's traditional war dance ... the haka. Jason and Mark are both of Samoan descent ... from where the dance originates.

Jason will be attending Mark's fight.

Anyway, from the looks of these vids ... Mark wasn't expecting the whole shebang. Surprised much?