The recent success of smaller training studios, also known as microgyms, has had a big impact on the club industry. Now, large club companies are not only taking notice, they're doing something about it.

Last week, Town Sports International (TSI), New York, announced plans to install UXF Training Zones in the majority of its clubs by the end of this year. TSI owns and operates New York Sports Clubs, Boston Sports Clubs, Philadelphia Sports Clubs and Washington Sports Clubs.

Already, more than 55 of TSI's 159 clubs (which do not include the recently acquired clubs from Fitcorp), have UXF Training Zones, which are marked by green turf floors and feature equipment such as suspension bands, battle ropes, sandbags, weighted sleds and tractor tires. These areas of the club are intended to emphasize functional movements to maximize fitness training and deliver results in a short period of time, according to the company, which translates UXF into Ultimate Fitness Experience.

"We've seen a huge shift towards functional training in the fitness world, but it's typically offered by specialized gyms, which don't often feature a diversity of other equipment and fitness programs," TSI CEO Bob Giardina said in a statement. "The UXF Training Zones have become so popular with our members that we're now planning to install 50 percent more than the amount we'd originally projected."

TSI trainers are teaching UXF Ripped classes in the UXF Training Zones. The classes blend core work with functional strength training and help members burn calories and build muscle while increasing stamina and agility.

"UXF Ripped classes challenge muscles in a new, meaningful way, whether it's by pushing sand bags, swinging kettlebells, flipping tractor tires or running up ladders," Chris Ruta, vice president of fitness for TSI, said in a statement. "It's grueling, but it's fun. And the results speak for themselves."