“We’re cracking the code on how to keep people at the gym,” Lazarus told me. “People want to visit places that satisfy their social needs. Getting people to exercise in groups makes it more likely they’ll stick with a workout. You can change the health of the nation this way.”

“We’re cracking the code on how to keep people at the gym,” Lazarus told me. “People want to visit places that satisfy their social needs. Getting people to exercise in groups makes it more likely they’ll stick with a workout. You can change the health of the nation this way.”

— Charles Duhigg