Anyone do these? Looking for something extra to throw into my leg day.. Targets the inner thigh. Jefferson Squats Exercise Data Main Muscle Worked: Quadriceps Other Muscles Worked: Hamstrings Equipment: Barbell Mechanics Type: Compound Video Guide: Windows Media - MPEGTips: These are a rare and unparalleled exercise for building your inner thighs. It is a normal squat, but while holding the weight between your legs. It does sound and feel awkward, but the results make it worth it.