PITTSBURGH (CBS) — Osteoarthritis affects about 27 million Americans, mostly in their knees. Now, a new study shows certain types of exercise can have big benefits.

Massoud Mofid has been taking a water workout class for 15 years to help his osteoarthritis.

READ MORE: Supply Chain Issues: 'There Really Are Problems Everywhere,' Even For Small Companies

“The pain was mainly down in the knees,” said Mofid. “I was able to walk perhaps at first, two to three blocks; then, it shrank to almost one block.

New research from the University of Minnesota’s School of Public Health shows that certain types of exercise may help knee osteoarthritis more than others.

“If you do strengthening exercises, if you do low-impact aerobic exercise, if you do some aquatic exercise, you can improve your life and you can improve your quality of life and reduce your pain,” said Dr. Survey Spencer, the director of the Vanderbilt Sports Medicine Center.

The Arthritis Foundation sponsors programs all across the country for thousands of people coping with arthritis.

READ MORE: Inbound Lanes Of Parkway East Closed Due To Overturned Tractor-Trailer Crash

Osteoarthritis is a joint disease that is the number one cause of disability in the United States. Doctors say sticking to an exercise program is key to relieving pain and improving mobility.

“If you moved the knee and get the knee moving gently, under low loads, it is very healthy for your tissues around the knees – both your arthritis as well as your tendons and ligaments,” said Dr. Spindler.

Longtime osteoarthritis sufferer Kit McCormick agrees working out in the pool helps her stay active.

“I’m doing things in the water that I cannot do on land, but when I get out of the water, it’s wonderful,” McCormick said.

Proving the right and consistent exercise program can make all the difference.

According to the CDC, approximately one in two people may develop knee osteoarthritis in their lifetime.

MORE NEWS: Pittsburgh Weather: Cool Morning With Mid-Day Warm-Up

More Health News