When Manny Pacquiao fights Floyd Mayweather Jr. on Saturday night, in what many consider the biggest fight of his life, he will be 36 years old. In boxing years, that’s something like being in your mid-60s. Pacquiao knows it too, though he isn’t attempting to hide from it. In fact, age has made him wiser.

“When I was 16 years old, I train, train, train the whole day,” Pacquiao says in a recent video released by Nike. “When you’re getting older, you have to balance your body. You have to give time to your body to rest. You have to survive.”

While Pacman is spending more time recovering than he has prior to past fights, he hasn’t stopped going 100 percent on days when it’s time to put in the work.

In this video, entitled “Inner Strength,” we find Pacquiao pushing himself through exercises like long runs, Crunches, Sprints, stair runs and ring work—an exhausting everyday schedule that has also forced Pacquiao to train his mind into being ready for the grind each and every day.

“You have to train your mind how you’re going to do it every day. How you’re going to do it in running, training, being at the gym. You have to focus on that particular training,” Pacquiao says.

If Pacquiao is considered an elder statesmen in the world of boxing, his training doesn’t show it.

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