David Krejci is healthy at the start of training camp, and that's good news for the Boston Bruins.

"I felt good," the center said after the first day of on-ice practice at training camp Friday. "This game's getting faster, so I'm just going to keep it light and keep [my] feet moving on the ice and the rest will pick up itself."

At this time last year, Krejci, 31, was attempting to return from offseason hip surgery. Although he played in all 82 games, he said he didn't feel 100 percent until January. It showed in his production: He had 54 points (23 goals, 31 assists), nine fewer than he had in 72 games in 2015-16.

In the Stanley Cup Playoffs, Krejci wasn't able to make it through the warmup before Game 1 of the Eastern Conference First Round against the Ottawa Senators and missed the first two games of the series.

"I just couldn't move my body," Krejci said, revealing the nature of his injury for the first time to NHL.com. "It just kind of ... I don't know what it was, what happened. My back and all the way down ... it was the first time. I just woke up a little weird but still went to practice and I just couldn't move."

Krejci said the pain was originating from his back and affecting his legs. Doctors conducted tests and gave him medication, and he was able to play Games 3 and 4. Krejci left Game 5 after a collision with Senators defenseman Chris Wideman. The injury to his MCL, which Krejci revealed Friday, sidelined him for the rest of the series. He said he wouldn't have been able to play had the Bruins advanced.

"It was frustrating because you play all 82 games and you have to miss [the playoffs]," he said. "And then you come back and two games later it happens again, it was tough."

After recovering from the injury, Krejci said he had a normal summer and is looking for a strong start this season. He's healthy, and likely linemate, right wing David Pastrnak, signed a six-year contract Thursday and will report to camp Saturday. Pastrnak was second on the Bruins in goals (34) and points (70) last season (Brad Marchand 39 goals, 85 points).