MIAMI – The update on Chris Bosh is that there is no update.Miami Heat coach Erik Spoelstra called Bosh a “game-time decision” for Game 5 of the Eastern Conference finals on Tuesday (8:30 p.m. ET, ESPN).“I have to use the afternoon to consult, not only with Chris, but with the training staff,” Spoelstra said.But there have been no setbacks, and Bosh has progressed. After arriving back in Miami, he worked out on Monday and took part in shootaround Tuesday morning.“It was encouraging this past week, he was able to do some more activity on the court,” Spoelstra said. “The last two days, he’s been able to do some real basketball work.”But there is still some uncertainty, because Bosh hasn’t had the opportunity to go full out.“He can’t test it like he normally would in a regular season game or a full-scale practice.”If Spoelstra was just keeping Bosh’s status a secret in the spirit of gamesmanship, Shane Battier, LeBron James and Dwyane Wade weren’t spilling the beans.“I don’t know,” James said. “It’s a game-time decision. He’s looked great the last couple of days, getting an opportunity to see him. So we’ll see.”“We can’t focus on it,” Battier added. “We have to approach Game 5 with our best effort yet. If he’s there, he’s there. If he’s not, he’s not.”And whether Bosh is on the floor or not, the Heat know they have to come out stronger to start the game, especially defensively. They allowed the Celtics to score a total of 64 first-quarter points in the two games in Boston.“We can’t put that pressure on Chris,” Wade said. “Us as a team, we’ve got to have an impact overall. Whenever Chris comes back, we’re not putting Chris to come and save the day. We’re a unit. We win together, lose together. It’s got to be all of us.”The Celtics know that Bosh gives their opponent another offensive weapon. And we’ve already noted how Bosh affects the Miami offense.It’s not just about the points Bosh scores. It’s also about the attention that Kevin Garnett has to pay to his man.“Right now, I’m doing a lot of the help,” Garnett said Tuesday. “Obviously our scheme will change a bit, as far as the bigs helping.”***John Schuhmann is a staff writer for NBA.com. Send him an e-mail or follow him on twitter.