Fitness & Exercise

Gigi Hadid's one forgiving boss -- she's not canning her security team after she was attacked in Milan ... TMZ has learned.

Sources close to Gigi say she believes the guy was only able to grab her from behind because her bodyguards thought he was a friend of hers or Bella Hadid.

That may sound like a weak excuse, but we're told the guards were only hired for Fashion Week -- it's not her personal crew -- so she's willing to cut 'em a little slack.

Gigi didn't need much help fighting off the grabby prankster anyway. Turns out ... she's been training for a moment like this.

A Ballet Bodies student plummeted to the ground when her instructor fell asleep on the job ... according to the woman, who also happened to be 65 years old at the time!

The senior citizen is suing the popular Hollywood workout joint for the incident, and in the suit she says the instructor made her attempt an advanced Pilates exercise called an inverted hanging pike. As you might imagine ... it didn't end well.

The woman says her instructor failed to spot her and she ended up falling more than 6 feet onto the hardwood floor -- directly on her head.

She says she suffered whiplash, a concussion and a cervical strain and continues to battle numerous nagging pains and headaches.

The inverted hanging pike is no joke, btw. Imagine your grandma in this position.

Sorry 'bout the visual.

Don't call it a comeback, but Christina Milian's quick hands are back in a boxing ring ... and it's more than just a great workout, because the sweet science is in her blood.

We're told she started taking classes this week with her trainer, Jason Ross, at LA Fitness in Hollywood. It's the first time she's laced up the gloves in years, but her grandfather and father both boxed and taught her from childhood.

The video's pretty sick -- Christina's already throwing strong combinations. We're told it's mostly about fitness now, but she's not ruling out sparring eventually ... with very thick headgear, we hope.

Don't mess with yer moneymaker, Tina!

Brock Turner's gonna have a hard time finding a pool where he can swim when he gets back home ... at least that's what a local club is saying.

The president of Brookview Swim and Tennis Club -- just 5 miles from Brock's house in Bellbrook, OH -- tells TMZ if Brock were to apply for a membership there ... he'd more than likely get denied.

Scott Dunham says normally a simple application would be enough, but the ex-Stanford swimmer is a special case. Dunham says he'd have to take Turner's application before the club's board of trustees and stockholders.

They'd get final say, and Dunham believes they would not hesitate to shoot down the convicted sex offender. He adds ... nobody in the community is happy about Turner's homecoming.

Cristiano Ronaldo's smokin' hot Miami makeout pal wants to share the love ... with a brand new workout video to help you get her world-class ass.

You remember Casi Davis ... the Florida-based fitness model who cuddled up and made out with CR7 poolside earlier this summer.

Well, Casi also happens to be a beast in the gym ... and has been puttin' in serious work to make sure her donk stays up to par for the biggest soccer star in the world.

Keep up the good work.

Brock O'Hurn isn't one to keep his dreamy locks wrapped in a man bun when he's gettin' ripped ... obviously he loses the hair tie.

We caught Brock out at the rings in Santa Monica where he got in an impromptu gym sesh -- sans his shirt. Now we know how he sculpts that bod of his for Tyler Perry's new TLC series, "Too Close to Home."

Mr. Man Bun hit some dips, pull-ups and even swung around on the rings a bit, flexing every muscle north of his belt.

Meet Destanie Yarbrough ... the pro football player turned MMA BADASS who's stepping up to fight the most intimidating woman in all of combat sports, Gabi Garcia.

You already know Gabi ... she's Anderson Silva's protege -- and she's so terrifying she's considered fighting men because the top female fighters are just too scared to take their chances in the ring.

Except one.

Yarbrough is destruction in motion on the football field as a running back in the Women's Football Alliance ... and has a reputation as one of the toughest athletes in the league.

She made the jump to MMA earlier this year and beat the living crap out of her first opponent.

We spoke with Destanie about her Sept. 25th fight against Gabi in Japan -- and one thing's clear ... SHE AIN'T SCARED!!!

There could be a HUGE new star in the world of women's MMA -- because the U.S. Olympian who just won the gold medal in wrestling says she's open to the idea of getting in the cage.

We spoke with Helen Maroulis -- the 24-year-old phenom who dominated the world at the 2016 Olympic Games in Rio -- and asked her straight up if MMA is in her future.

Maroulis made it clear wrestling is her main priority and first love ... but says a transition to MMA is definitely a possibility down the road.

The best part of the video ... Maroulis says she'll 100% return to the Olympics in 2020 to defend her title.

It's a good thing Michael Bisping can multitask ... 'cause the UFC middleweight champ says he'll be training for his next fight against Dan Henderson while shooting his new movie in London.

Bisping locked up a role in the bare-knuckle boxing flick, "My Name Is Lenny" -- which starts filming this week. Bisping says his part will take roughly 2 weeks to complete.

But he also has a huge fight coming up against Hendo at UFC 204 in October -- just 7 weeks away.

So, how will he be able to prep for the fight and shoot the flick?

"My trainer's gonna come with me. I'm still gonna train every day. Film the movie. Come back. Focus on the fight. Kick some ass."

FYI, other fighters like Paige VanZant and Conor McGregor have turned down roles to focus on training camp -- but clearly, Bisping thinks he can handle both.

Swimmer Jimmy Feigen's nearly $11k deal to avoid a Rio jail could backfire against future Team USA Olympians.

TMZ has learned Feigen's $10,800 donation has been tagged to spruce up training facilities for the Reaction Institute in the Rio favela known as City of God. Specifically, we're told the money is going to help fix walls and prevent weather damage to judo equipment.

That equipment is used to give children from the favelas judo training, and put them on the road to becoming Olympians -- who might one day whoop-up on American judo fighters. Brazil's judo gold medalist this year, Rafaela Silva, once trained at the Institute ... so it has a good track record.

As we reported, Feigen struck a deal with prosecutors in Rio ... who agreed to let him off the hook, if he made the donation.

NHL legend Jeremy Roenick says he wants to personally mentor Justin Bieber on the ice -- telling TMZ Sports he GUARANTEES he can take JB's skills to the next level.

Roenick says he saw the new hockey footage Bieber posted online this week -- and was genuinely impressed ... but says the guy has serious room to grow.

"He's pretty tough up top, I don't know about the calves and the thighs though ... it's a little weak."

So, what's the plan?

Jeremy says he'll put together a REAL comprehensive hockey-based workout plan for Bieber -- noting, "I will make you a WAY better hockey player."

David Beckham's 17-year-old son made a fashion statement on the way into a spin class in L.A. Wednesday -- rocking a pink gay pride tank top ... with the socks to match!

Brooklyn Beckham and his world-famous father hit up SoulCycle for a little father/son workout sesh ... followed by a smoothie at the famous Earthbar cafe.

As for the shirt, it's from Palm Springs Gay Pride in 2011 ... so, we're guessing Brooklyn was just going for more of a retro look.

One more thing ... Brooklyn's currently dating Chloe Moretz.

Serena Williams has absolutely NO DAMN SHOT to beat a top men's tennis pro ... that's according to tennis legend Billie Jean King ... who says Williams would go down hard to any of the elite guys.

Billie Jean King is a TITAN in women's sports -- most notably for pummeling Bobby Riggs (who was 55) in a co-ed tennis match dubbed the "Battle Of The Sexes" back in 1973.

We got King out in L.A. recently and wanted to know if the seemingly unbeatable Serena would fair as well against an active men's pro, as King did against Riggs.

Billie's short answer? HELL NO.

King leaves the door open for Serena to do work against guys at the bottom of the male tennis tour, but makes it clear the Federers, Nadals and Djokovics of the world would all smoke her.

Here's supermodel Gigi Hadid ... proving she's one hell of an athlete -- by hitting a heavy bag -- IN HEELS!!!

Hadid hit up Gleason's Gym in Brooklyn -- and despite the fact she was wearing (what appeared to be) leather leggings and chunky heels ... she went all Rocky Balboa anyway -- and looked damn good.

Gigi's been boxing for a while -- and she's picked up a pretty solid overhand right.

#Respect.

Calvin Harris works out like a real-life pro athlete ... so says Minnesota Vikings safety Antone Exum, who says the DJ blew him away during a Thursday gym sesh.

Here's video of Jason Pierre-Paul doing something with 3 fingers that you couldn't possibly do with all five ... pumping a 120 dumbell with the hand he blew up in that fireworks disaster.

It's super impressive ... JPP -- ever in training mode -- breezes through his set like it's nothing, almost making you forget he lost a couple fingers in the accident ... fingers you'd think he needs to lift heavy.

He obviously doesn't ... leading us to our next question.