This is ludicrous. The point of Z2 is a specific physiologic adaptation. There isn’t really any mental pain. Anything you can do to make your training more cons

This is ludicrous. The point of Z2 is a specific physiologic adaptation. There isn’t really any mental pain. Anything you can do to make your training more consistent is positive for your long term performance. Save the mental gymnastics for the actual hard days. Staying in a hard VO2 interval or pushing through on those long threshold efforts is an actual mental exercise. Don’t push the belief onto people that staring at a wall in Z2 is giving you some gains. If it works for you then go for it, but it’s a wild mentally that thinks a physically easy ride needs to be hardened up.