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49ers coach Jim Harbaugh doesn't want Colin Kaepernick getting "too jacked up"

49ers coach Jim Harbaugh worries about quarterback Colin Kaepernick's workout regiment.  (Ezra Shaw/Getty Images) 49ers coach Jim Harbaugh worries about quarterback Colin Kaepernick's workout regimen. (Ezra Shaw/Getty Images)

San Francisco 49ers quarterback Colin Kaepernick wasted no time after the team's loss to the Baltimore Ravens in the Super Bowl to get back in the gym and get to work on next season.

His coach, Jim Harbaugh, worries that his new franchise quarterback may be becoming too strong, too fast.

"If you're just talking about weightlifting and upper-body strength, yes, I think there is that fear," Harbaugh said to Comcast SportsNet Bay Area. "It's something we've talked about. 'I don't want you getting too jacked-up, Colin.' I want some speed, quickness, not just (flexing chest his muscles).

Kaepernick's arm certainly does not need to get any stronger. His throws the ball with plenty of velocity, to be sure. He dislocated Randy Moss' finger with one laser last season. And during Super Bowl week, 49ers teammate Michael Crabtree said some receivers would rather catch warmup passes from the other quarterbacks.

Kaepernick completed 62 percent of his passes with 10 touchdowns and three interceptions last season after taking over for an injured Alex Smith in Week 10.

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