Before Brett Favre revealed his Parkinsons diagnosis, the NFL alum explained why he thinks concussion is still a dirty word in the world of football.

Favre spoke at length about what the league is doing to protect players in a recent interview on the Me, Myself & TBI: Facing Traumatic Brain Injury Head On podcast with host Christina Brown Fisher, which was recorded prior to Favre sharing his diagnosis during a congressional hearing on Tuesday.

During the interview, Favre said he had serious doubts about whether new research into how a traumatic brain injury can affect an athletes health will change the way pro footballers play. He said he wonders if the NFL is really doing the most it can to protect players from long-term harm.

The quarterback told Fisher, herself a survivor of TBI, that he would be shocked to hear about players even discussing concussions privately, let alone the repercussions that they may have on their life after.

Concussion is a bad word to the NFL, he explained, later also calling the topic taboo.

Research has shown extensive links between contact sports like football and chronic traumatic encephalopathy, a degenerative condition which can result in memory loss, depression, anxiety, headaches, stress, sleep disturbances and other neurological issues.