Professional football league XFL said on Monday it has reached an agreement with the NFL to collaborate on programs aimed at innovating the game and protecting the health of players.

The main focus of the collaboration will be health and safety initiatives, with the two leagues working on forward-thinking physical and mental fitness programs for players, the study of playing surfaces and equipment.

"The XFL has shown us that innovation is one of its core principles," Troy Vincent, the NFL's executive vice president of football operations, said in news release.