Why was this research done?

Strengthening and range of motion exercises are known to reduce pain and improve mobility in people with knee osteoarthritis. Digital technology such as computer or iPad® applications and Fitbit® step trackers may help people stick with the exercise plan recommended by their health care providers. The researchers wanted to know if using digital technology would reduce pain and increase physical activity for people after knee replacement surgery. People who used digital technology did not have lower pain scores compared to patients who didn't use the technology, but they reported lower pain intensity, and lower disability due to pain. Concerns about this study include the need for people to be comfortable with using the internet and and that participants knew which treatment group they were assigned to which could have affected how well they did at following their exercise plan.