ORLANDO, Fla. (AP) — The NFL has implemented new rules, banned another type of tackle and introduced equipment aimed toward improving player safety.

Keeping players healthy has been a priority for a league that had so many star players suffer significant injuries in 2023. Aaron Rodgers, Joe Burrow, Kirk Cousins and Justin Herbert — four franchise quarterbacks — combined to miss 36 games. They were just a handful of the high-profile players to finish the season on injured reserve, though overall, NFL players missed a combined total of 700 fewer games in 2023 than in 2022.

Figuring out the best ways to help players stay on the field is a collaborative effort for the league and its teams, so the NFL last month held a combined medical summit believed to be the first of its kind in any sport.

While owners, general managers and coaches gathered for the league’s annual spring meeting at a resort 18 miles away, more than 400 athletic trainers, equipment managers, strength and conditioning coaches, nutrition experts and sports science directors came together to learn from each other and from the league’s research partners.