The departure of LeBron James earlier in the summer could impact on how Miami's revamped roster plays, with Bosh potentially having to return to low block tactics with his back to the basket.
"I had to play a role," Bosh said of his previous defensive efforts, according to the Sun Sentinel.
"I had to play the role for the championships. I feel that I'm back to doing what comes naturally for me, which is being back in the post, being more aggressive. I'm really excited to show the city of Miami what I have."
The new season is due to get underway on October 28, when the San Antonio Spurs take on the Dallas Mavericks.