If you feel self-conscious about having really skinny legs, you need to do some training to bulk them up. This infographic features 19 exercises you can do to take your legs up a few sizes. A Skinny Person's Guide to Gaining Weight
An isolation pull exercise. Muscles worked: Internal and External Obliques, Psoas Major, Iliocastalis Thoracis, Iliocastalis Lumborum, and Quadratus Lumborum. Also called the seated barbell oblique twist.