Buffalo Bills safety Damar Hamlin has been medically cleared to resume football activities following his cardiac arrest during an NFL game in January, the team announced Tuesday.

Hamlin revealed that his cardiac arrest was caused by commotio cordis, a rare condition that occurs when a blow to the chest at a specific moment in the heart's rhythm can trigger cardiac arrest. The condition typically results from impact during a narrow window of vulnerability in the heart's electrical cycle.

The 25-year-old safety collapsed on the field during a Monday Night Football game against the Cincinnati Bengals on January 2, requiring immediate medical attention and CPR before being transported to a hospital. The incident led to the suspension and eventual cancellation of the game.

Hamlin spent several days in critical condition at a Cincinnati hospital before being transferred to a Buffalo medical facility for continued care. His recovery became a focal point for the NFL community and fans nationwide.

The clearance to return to football activities represents a significant milestone in Hamlin's recovery process. Medical professionals would have conducted extensive cardiac evaluations and testing before determining it was safe for him to resume physical activity at the professional level.

Commotio cordis, while rare, has been documented in various sports, particularly those involving projectiles or contact. The condition can be fatal if not treated immediately with CPR and defibrillation.