Kellan Lutz Shirtless, Running Pictures

Kellan Lutz flexed his muscles during a shirtless jog and fitness session along the beach in LA yesterday. Kellan's impressive upper half was on display as he worked out on the rings. Kellan's body will be front and center in his upcoming big-screen release Immortals, though this weekend he'll be back in Twilight mode when he joins his costars at the Teen Choice Awards. Kellan, Ashley Greene, Taylor Lautner, and Robert Pattinson are all expected to be on hand, however Kristen Stewart will likely miss out on the fun while she's away filming Snow White and the Huntsman in the UK. Kristen stepped up her own workout game to get in shape for her badass fairy-tale role, and she may have even picked up a few tips and tricks from her super fit fellow vampires. Kellan's toned torso earned him first runner up to Taylor Lautner in last year's PopSugar Shirtless Bracket and the Twilight guys will have another shot at the title next week when we kick off the 2011 competition!