Those off-ice workouts - both in-season and during the summer - have become the stuff of legend as the 6-foot-9, 250-pounder continues to keep his body in peak physical shape, while also altering and tweaking his game to keep up with the league's ever-increasing speed and skill.
"I wouldn't call them sacrifices, you just have got to accept some changes," said Chara. "You've got to change a few things in your game, in preparation and training and all of those other things. I think just the nature of the game in these days, if you play for that long, you can't be always stuck in the same lane. Sometimes you have to reach and make those changes for your benefit. I was able to, obviously. I'm working on those improvements and always try to improve and get better."
It is that mindset, combined with his leadership and veteran presence that has been of such benefit to Boston's young crop of blue liners, as well as so many of the 195 different teammates he's had during his Bruins tenure.
"A ton," Matt Grzelcyk said when asked to describe how much Chara has meant to his development. "He treats his body so well on and off the ice, kind of showing the road for the D, no matter how big or small you are. He's always very vocal with us, on the bench pointing things out that we can do better and just watching him lead by example. It's been an honor to call him my teammate."
And while staying in shape has certainly helped Chara extend his already Hall of Fame-worthy career, there is another, perhaps far more important, reason for his sustained level of success - an unmatched passion and affection for the game that has given him so much.
"I think there's a number of things involved," said Chara. "You've got to be, obviously, lucky, too, but I think it really comes down to loving what you do. Having passion for it and you've got to have the will, whether it's sometimes going above and beyond and sacrificing and doing all of these things that will eventually pay off.
"And believing. I think you've just got to kind of accept that it's not always going to be great, you're going to hit some adversity and challenges. But that's just the nature of our lives, no matter what you do. Once you hit those you, you kind of have that mindset that you never give up and always go after it.
"You've got to love what you do."
And, clearly, where you play.