Brett Favre looks totally jacked as he gets fitted for Hall of Fame jacket

Favre in Oct. 2005 when the Packers visited the Panthers.  

The Sporting News/Sporting News via Getty Images

Not many athletes become more physically fit after the conclusion of their professional careers.

What’s the 46-year-old’s secret? Probably weight training, triathlons (see below) and additional exercise thanks to all those outdoorsy Wrangler commercials.