Video: Young Celtics hit the gym with Bryan Doo

Bryan Doo, the Boston Celtics' head strength and conditioning coach, has been working with a lot of the younger C's this summer to get them into good physical shape for the upcoming season.

Among those who Doo is working with in the above behind-the-scenes video are Phil Pressey, Kelly Olynyk, Chris Babb, and Chris Johnson.

I would have liked to have seen some of the newly acquired Celtics working out with these guys, but Babb and Johnson are most likely working extra hard since their contracts are unguaranteed and they still have to prove themselves with the roster over the limit at 17 men.