SANTA CLARA -- Outside linebacker Parys Haralson, who sustained a complete tear of the triceps tendon in his left arm Aug. 26, began lifting weights three weeks ago.
Haralson said Friday he is on pace to resume football activity during the offseason -- whether it's organized team activities or minicamp.
"They told me the rehab was anywhere for four to six months, depending on how you go about the rehab," Haralson said. "A lot of it depends on the work you put in.
"It's a gradual thing. You start off with a little bit, as far as getting the range of motion back and making sure you break all the scar tissue. It's more of a buildup of doing the little things, not overworking it but getting enough work so you can tell it's getting stronger."
Haralson engaged a Denver Broncos tight end during the exhibition game and immediately felt a shooting pain in his arm. The tendon became detached and the triceps muscle rolled up in the back of his arm.
Defensive tackle Justin Smith sustained a partial tear of his left triceps tendon on Dec. 16 in the third quarter against the New England Patriots. Smith's tendon is still partially connected, which is why he still has hope of contributing when the 49ers open the playoffs Jan. 12 at Candlestick Park.
Smith is expected to undergo offseason surgery to fully reattach the tendon. He will likely have a four-to-six-month rehabilitation, too.
Haralson said his rehabilitation has been encouraging. He was cleared to begin bench-pressing three weeks ago, and he already has seen significant improvement in his strength.
"There's a bit of a mental barrier you have to clear because you haven't done it in a while," Haralson said. "So you start out light and you're getting tired a lot faster. Now, it's getting stronger. It's just a matter of building the strength back up and getting it back strong like it was."