Fitness & Exercise

Spencer Pratt's haters -- and there are many -- are gonna LOVE this clip.

Heidi Montag's hubby just earned his brown belt at Paragon Brazilian Jiu-Jitsu in the Valley ... which means he's now a certified badass. He's one step away from a black belt, after all.

But the former 'Hills' star celebrated his martial arts achievement by taking a thrashing from everyone in his dojo ... even little kids.

What did the 5 overly-tanned fingers say to the face? SLAP!!!

Greek bodybuilder Giannis Magos went all Rick James, Zsa Zsa Gabor on a judge at a bodybuilding competition this weekend ... delivering an open hand power slap after losing the championship.

Magos was reportedly pissed off he didn't win the 2016 IFBB Diamond Cup during the competition in Greece. There are reports he took out his dong before getting violent ... but that part wasn't captured on video.

The ex-couple who founded Barry's Bootcamp got a pretty even split in their divorce with one major exception ... she's getting the keys to the house.

Rachel Mumford filed for divorce from John Mumford back in May 2014, but they just reached a final settlement. They'll share custody, joint and physical, of their 2 teenage kids ... divvy up their bank accounts, and they get an equal share of their interest in the hugely popular fitness biz.

Rachel gets the prize ... their pad in Malibu. The divorce was nasty from the start ... with her dropping allegations of violence and drug abuse.

Cristiano Ronaldo has called in the big guns to increase his already blazing speed -- a guy nicknamed "King Feet" ... and the video is insane.

His name is Luis Badillo Jr. -- and he's said to have the quickest feet on the planet. He's worked with pro athletes from the NFL and the NBA ... and even world-class sprinters like Asafa Powell.

Now, CR7 has called for his services -- and the two have been jamming out speed drills all day long.

It's insanely impressive ... and no, the videos aren't sped up ... it's all real time.

JAMIE FOXX GOT HANDS!!

We've already seen him throw ... but now the "Ray" star is proving he can haul in passes too -- even when the ball is being fired at him at 100 MPH!

Foxx was training at the Sports Academy in Thousand Oaks while shooting his new flick "All-Star Weekend" -- when his buddy, Tony Besson, challenged him to get into the "100 MPH Club."

The ball was shot at him by a JUGS machine -- and the challenge was to catch the ball twice ... while taking a step closer the second time around.

Think Jamie was afraid? Hell no.

Adriana Lima didn't get her model figure from walking runways, she worked her ass off -- although she's got plenty left.

The Victoria's Secret Angel was out in Miami Monday for a workout/photo shoot where she showed off her best positions in the gym. It's pretty impressive, except for one thing.

It hasn't even been a week since Lindsey Vonn broke her arm and underwent emergency surgery ... and she's already got her ass back in the gym.

The Olympic skier hit the exercise bike over the weekend -- while trying to balance a weighted staff with the right arm she snapped during a ski crash on Thursday.

Vonn had a plate and screws put in her arm during surgery -- and now she's rocking a cool black sleeve and brace while it heals up.

#NoDaysOff

It takes great sacrifice to be a great champion and Serena Williams is making the biggest sacrifice of all -- DONUTS!!!!

The tennis superstar was greeted at LAX by a fan who wanted to gift Serena with a dozen delicious treats from the legendary Randy's Donuts in L.A.

Problem is, Serena had to shoot down the offer explaining, "I'm not eating donuts right now. I'm trying to get fit."

We get it ... she's gearing up for her return to the court at the ASB Classic in Auckland, New Zealand in January.

But for the record, she looks pretty damn fit to us.

Hilary Duff sure knows how to bag 'em ... just get a load of her swollen BF.

Hilary and her celebrity trainer BF, Jason Walsh, were on their way out Thursday at LAX. Our photog does his best to grill the hot couple but we'll forgive you if your eyes are fixed on his ripped bod.

Notice he's carrying ALL the bags.

#HotDamn

Greg Hardy has been training his ass off as an MMA fighter -- linking up with one of the top gyms in the country where he's been living and sleeping while working under the tutelage of an ex-UFCer.

TMZ Sports has learned ... the 28-year-old ex-NFL star has been training with American Top Team in Florida -- which Dana White once hailed as one of the top 5 MMA teams in the country.

We spoke with one of Hardy's trainers, Mike Brown -- a former UFC fighter who actually fought and BEAT Urijah Faber TWICE in his MMA career.

Brown says Hardy has been living at the training facility -- "He's staying in the dorms we have upstairs. It's for guys who are really in intensive training."

While at ATT, Hardy has been working out with legit MMA studs like King Mo -- who seems to have taken a liking to the ex-Pro Bowler.

So, how does Hardy look?

"He seems to have the drive and desire," Brown says ... noting that Hardy has been taking classes in multiple disciplines to hone his skills.

"He took boxing last night, jiu-jitsu today. He was training with Steve Mocco, our wrestling coach, who was in the Olympics."

As far as taking a pro fight, Brown says there's a shot he could debut in 2017 taking a low-level pro fight or an amateur fight. Stay tuned ...

Rob Kardashian's breakin' a sweat ... and it's more than just alright.

Rob joined big sisters Kourtney and Khloe for a CrossFit-style workout -- with some RiRi in the background for inspiration. Rob was working the middle hard ... courtesy of a medicine ball and some TRX bands.

Demi Lovato's got hands of stone ... just ask Sylvester Stallone.

Demi and Sly strapped on the gloves Wednesday at Jay Glazer's Unbreakable gym on the Sunset Strip -- and she obviously has some ring experience ... of the Hollywood variety, at least.

Rocky was having fun, although he claims he slipped when he hit the mat. Decide for yourself.

BTW, the "Creed" sequel is slated for November, 2017. Get DL a script, stat!

Just sayin' ...

He's been a bodybuilding champion, a movie star, and the governor of California ... but Chael Sonnen still thinks Arnold Schwarzenegger missed his calling ... as a dominant MMA fighter.

We got Chael out in L.A. and asked how he thought Arnold would do in MMA ... being that CS had just told us he's expecting his 'Celebrity Apprentice' boss to be at his big fight in Inglewood next year.

Check out the clip -- it's clear Chael LOVES him some Arnold ... saying that the guy's never failed at anything ... and he thinks that would carry over into the combat arena.

Brooke Hogan says she's recruiting the BEST female athletes in the world to join her new female pro wrestling league -- and she's got her sights set on Ronda Rousey.

Richard Simmons' famed exercise studio Slimmons is closing for good ... TMZ has learned.

The reclusive Richard hasn't been seen in public for more than 2 1/2 years, and it eventually took a fatal toll on his studio, where he was once a fixture. Simmons simply disappeared.

The studio sent out notices it would be out of business effective November 19th.

TMZ broke numerous stories about Richard over the last 2 years, including concerns he was being held against his will. The LAPD did a welfare check in January 2015 and found he was fine.

Richard has said he wanted out of the Hollywood spotlight and was battling knee problems, but others who were once a big part of his life think it's much deeper than that.

Simmons was hospitalized June 3rd, after his housekeeper called 911 and told the dispatcher he was exhibiting bizarre behavior. Simmons later said it was simply a case of dehydration.

Here's Ray Rice ... continuing to train for a possible NFL comeback -- and busting his ass on the treadmill at 22 MILES PER HOUR!!!!

Yeah, that's fast.

It all went down at BlueStreak Sports Training in Stamford, CT -- where Ray and his wife, Janay, have been putting in work for years.

Our Rice sources tell us the running back feels he's in the best shape of his life -- and still believes he can make a real impact on an NFL team ... if he gets a chance.