Habits are something Miami coach Erik Spoelstra talks about often with his club, that word becoming as much of his everyday vernacular as probably any other.

Kelly Olynyk has noticed. He’s also noticed that habits can be tough to break.

High on the to-do list for the Heat during this training camp that ended with a scrimmage Saturday was this: Getting Olynyk, the former Boston Celtics forward who signed a four-year deal with Miami this summer, as involved as possible with a core that largely returned intact from last season. It’s a process, though both Spoelstra and Olynyk said afterward they like the way things are heading.

“When you’ve been in this league for four, five years, whatever it is, and where you were you’ve done it one way the whole time, that’s kind of ingrained in your mind,” Olynyk said. “And over four, five years those actions become habits and those habits become routines and rituals. Now when you flip the script and you’re getting into a game or a scrimmage, your body automatically drives toward those habits rather than what you’re quote-unquote supposed to do.”

Old habits indeed die hard. When Heat guard Josh Richardson went down the lane in the third quarter of the scrimmage, Olynyk — who was a bit of a pest, to put it nicely, in past games against Miami — sprang into action and defended the paint with his usual vigor.

Richardson got a bloody nose for his efforts.

“He can foul someone else now,” Richardson said.

Miami is bringing back its top nine scorers in terms of points-per-game from a season ago, plus has Justise Winslow returning from shoulder surgery and is finding ways to get Olynyk and rookie Bam Adebayo in the mix as well.

“Kelly just fit right in because of so many things he can do,” Heat guard Dion Waiters said. “He’s a guy who can stretch the floor, he can post up, he can pass the ball out of the post, he can do a lot of different things.”

Those are the habits the Heat want.

“There’s still a progression,” Olynyk said. “I’m still getting used to things.”

Miami opens its six-game preseason schedule Sunday at home against Atlanta.

Kawhi Leonard rehabs

A lingering thigh injury for Kawhi Leonard has the San Antonio Spurs’ season off to an ominous start. Leonard will miss the entire preseason while rehabbing an injury to his right quadriceps, the Spurs announced.

Coach Gregg Popovich told reporters that the thigh has bothered Leonard since the playoffs. The two-time All-Star and two-time defensive player of the year has been working on rehabilitation all summer but is not ready to play.

“It’s just from last year, working on things from last year,” Popovich said. “It’s gone a little more slowly than we thought.”

Frank Hamblen dies

Frank Hamblen, who won seven NBA championships as an assistant to Phil Jackson in Los Angeles and Chicago, died Saturday. He was 70.

The Lakers said Hamblen died in Del Mar, Calif. They did not provide a cause of death.