JOINT BASE SAN ANTONIO-FORT SAM HOUSTON, Texas -- Wounded and injured service members are getting pumped up about a cutting-edge strength training program at Brooke Army Medical Center.

This groundbreaking program, called blood flow restriction training, offers warriors huge gains from low-resistance exercise.

"I've seen some very dramatic results," said Johnny Owens, chief of Human Performance Optimization Program at BAMC's Center for the Intrepid. "The training is proving a game-changer for our warriors."

In BFR, a physical therapist applies a specialized surgical tourniquet to an injured limb to partially restrict blood flow during low-weight strength training. This signals the body to use fast-twitch muscle fibers typically set aside for high-resistance exercise, such as heavy weight lifting, Owens explained.

As a result, the brain triggers an 'anabolic cascade,'" he said, meaning substances such as human growth hormone are released at a higher than normal rate.

Results have been "very dramatic," Owens said, citing 30 percent to more than 300 percent strength gains. "The best part is the results seem to happen very quickly -- within two to four weeks."

Marine Staff Sgt. Brandon Kothman started BFR three months prior to knee surgery to build muscle strength and function, then resumed training immediately after. His surgeons told him he should be back running in nine months to a year, but thanks to the BFR, "I was running after three months and released back to full duty in six," he said during a recent ESPN interview.

This day at the CFI, he's lifting a 10-pound weight on a leg extension machine while wearing a tourniquet. "It feels like I'm lifting 40 or 50 pounds," he said, slightly out of breath.

Owens first learned of the training about three years ago when researching ways to help his patients with lower extremity injuries. He wanted to help them build strength quickly and effectively without the pain or risk of further injury to an already compromised limb.

"To get strong you need to lift heavy weight, but warriors with severely damaged limbs often can't do that," he explained. "I wanted to find a solution that would prevent my patients from a frustrating recovery or even, in some cases, opting to amputate their leg due to a lack of strength gain over time."

Owens' enthusiasm for the training was tempered by a lack of research. It's been used sparsely in Europe and Japan, but he's yet to hear of a practical clinical application in the U.S.

However, when some well-respected journals began publishing literature on its effectiveness, he pitched it to his bosses and decided to try it on himself. After six months of positive results and the green light from leadership, he implemented the program at the CFI. He's since used it to aid patients with upper and lower extremity injuries, as well as amputees.

Owens cited a recent case where a CFI patient showed a 372 percent increase in calf strength 9 months post-Achilles surgery.

Moving forward, Owens and a team of CFI researchers are looking to see how BFR can benefit a variety of populations, such as post-ACL surgery and post-arthroscopy of the knee.

"Injuries can be just as devastating to a service member's military career as to a pro athlete's," Owens told an ESPN reporter. "If you can't carry a pack or run, you can't do your job. Tourniquet training has the potential to make a remarkable impact for recovering warriors."

On a wider scale, Owens sees a tremendous benefit for civilian trauma patients, the elderly or anyone, including athletes, seeking a swift recovery post-injury. There's also a potential for home use, he said, but that would require a smaller portable unit.

Owens stressed the importance of proper application. His tourniquet system automatically monitors and maintains pressure, he explained, and is applied and monitored by a physical therapist. In other words, at this point, "don't try this at home," he said.

After using BFR successfully on more than 200 warriors in the past two years, Owens said he's blown away by the results. "The training has tremendous potential," he said.