Gastrocnemius

Calf

exercies:

squats

http://www.flashmavi.com/weight_training_legs_how_to_do_squats.shtml

http://exercise.about.com/od/lowerbodyworkouts/ig/Lower-Body-Exercise-Photos/

Seated calf raise.

http://www.flashmavi.com/weight_training_legs_calves_seated_calf_raise.shtml