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Jason Walsh was pissed. The 39-year old Los Angeles personal trainer, fresh from muscling-up Bradley Cooper for American Sniper, walked uninvited into the Sirens & Titans gym in high-rent Westwood last July to confront owner Jacques DeVore about a new group workout class the latter was promoting. “I invented the VersaClimber group workout,” he told DeVore, accusing him of taking his idea for classes based on the vertical climbing machine. “I’ve been planning it for years.”听
“Are you kidding me?” replied DeVore. “I鈥檝e been using the VersaClimber since before you were born.鈥澨�
Soon after their exchange, DeVore was holding 25 high-intensity, music-blasting, 30-minute classes a week on 18 VersaClimbers. Walsh wouldn鈥檛 offer a class until after New Year鈥檚, but when he did, it was on 33 machines in a dedicated VersaClimber studio called ,听five miles away from DeVore’s setup. Most significantly:听Walsh’s听press releases insist that he invented the first VersaClimber group workout, which he鈥檒l take nationwide in a climb-to-the-music format akin to vertical Spinning.听
It doesn鈥檛 take a genius to see that the winner in this feud is the funky itself. Invented in 1980 by a mechanical engineer, the machine was鈥攗ntil now鈥攐ne of the most-ignored pieces of fitness equipment of all time. The VersaClimber is a seven-foot, 75-degree vertical rail with alternately sliding hand and foot pegs that delivers a strenuous all-body, aerobic 鈥渃limbing鈥� workout. (Imagine climbing a never-ending ladder and you鈥檒l get some idea of what it鈥檚 like.) The trouble: It鈥檚 too strenuous for most people. The rare gyms that still have a VersaClimber on the floor might as well use it as a coat hanger.

Although popular among pro and college sports teams and rehab therapists鈥斺€淚t鈥檚 the only cardio machine I approve for our players because the no-impact, contralateral motion mimics natural human motion without an injury risk,鈥� says听, team doctor for the L.A. Clippers鈥攖he VersaClimber scares average folk.
That鈥檚 why this VersaClimber war听delights Dan Charnitski, son of the inventor and general manager of , the Santa Ana, California鈥揵ased manufacturer of the machine. 鈥淚t鈥檚 the right product at the right time,鈥� he says. 鈥淲e hung in here. It only took 35 years.鈥�
The VersaClimber鈥檚 heyday as a fourth option to treadmills, exer-bikes, and rowers disappeared when stair-stepper machines and ellipticals came along in the 1980s and 鈥�90s. Heart Rate Inc. has sold just 40,000 VersaClimber units worldwide over three decades. 鈥淣ot talking a lot of volume,鈥� shrugs Charnitski. 鈥淲e do better in Europe.鈥�
So when Walsh came to VersaClimber in July 2012 with his plans to open the world鈥檚 first VersaClimber studio, Charnitski was thrilled. But he couldn鈥檛 talk about it because Walsh requested and got a nondisclosure agreement. 鈥淚 kept it mum,鈥� says Charnitski. 鈥淭hen the article in Details magazine came out.鈥�
The announced that Walsh, who had been using VersaClimbers for years to train private clients such as Jessica Biel, Ben Affleck, and Justin Timberlake, was 鈥渓aunching a high-intensity climbing class at his new in West Hollywood, with plans for a New York outpost to follow soon.鈥澨�
[quote]VersaClimber is a seven-foot, 75-degree vertical rail with alternately sliding hand and foot pegs that delivers a strenuous all-body, aerobic 鈥渃limbing鈥� workout. The trouble: It鈥檚 too strenuous for most people.[/quote]
DeVore, a high-performance specialist who claims to have once owned the VersaClimber mile record of 27 minutes, 30 seconds,听was opening a large new gym on the city鈥檚 west side just around the time the article was published. 鈥淚鈥檇 seen the article in Details听but already had made my decision,鈥� he says. 鈥淏esides, I looked around and saw no gym anywhere. The sales manager said they鈥檇 been approached about classes for years, but I was the first to pull the trigger.鈥�
VersaClimber classes at both gyms are 30 minutes long, but they鈥檙e different in atmosphere and intent鈥攈ardcore versus Hollywood. DeVore鈥檚 class is set in a concrete-floored room filled with weight machines, mats, and spin bikes. His competitive, all-out interval sessions are designed to ramp up the VO2 max of his high-performance, cyclist-runner-triathlete clientele.听
Eighteen climbers are set up in groups of three. They hop off several times during the lung-heaving workout to write how many feet they鈥檝e climbed (a stat shown on their VersaClimber鈥檚 monitor) on a whiteboard on the wall, much like CrossFitters jot down their reps or interval times.
DeVore walks around the room like a mad scientist, barking out instructions and syncing the throbbing music. It鈥檚 exhilarating. Excited classmates tell stories of weight loss and faster running and cycling times.

In contrast, Walsh鈥檚 facility is a dedicated single-room VersaClimber gym. It鈥檚 a futuristic visual feast, festooned with a faceted, neon-lighted mirror ceiling that changes color. Climbers are arranged in a semicircle around an instructor鈥檚 stage that鈥檚 bolted to the rubberized floor. A young female instructor led us in rhythmic 鈥渙ne-two-three-rip鈥� stroke patterns and then all-out intervals. It鈥檚 fun. Less intense than DeVore鈥檚 class but still taxing and exhilarating.
Both leave you drenched in sweat and, according to Collenello, physiologically improved. 鈥淭he cross-crawl motion with your butt pushed out is exactly the same thing you do as a baby learning to move,鈥� he says. 鈥淪o it reinforces natural neuromuscular movement patterns and strengthens your core, making it safe for your joints and great for your back.鈥� In fact, 75-year-old Joy Hayward, a Pacific Palisades business manager and three-times-a-week climber, raved that her lifelong back pain disappeared after her second class.
While DeVore won the race to open the world鈥檚 first VersaClimber gym, he and Walsh both know, feud or not, that both win in the long run if their near-simultaneous debuts cause VersaClimbing classes to take off.
鈥淚 was just called by a reporter from Vogue doing a story on Jason鈥檚 gym,鈥� says DeVore. 鈥淪o because of him, I鈥檓 in Vogue!鈥� Walsh remains adamant that DeVore ran with his idea but ultimately admits, 鈥淚n truth, my ego is just bruised.鈥�
As for VersaClimber, which features both classes on its website, there鈥檚 a strange and wonderful optimism in the air.
鈥淲e鈥檙e very excited about this,鈥� says the low-key Charnitski. 鈥淕osh, for me to say I鈥檓 excited means I鈥檓 excited. It鈥檚 awesome. We knew it was one of the best things you could do for exercise鈥攂iomechanically correct, super aerobic. Everybody wants an all-body workout nowadays. Climbing? Maybe its time has come.鈥�
Roy M. Wallack writes a biweekly fitness gear column for the Los Angeles Times and is the author of Bike for Life: How to Ride to 100鈥攁nd Beyond.