By far the best exercise for strong, defined legs - Sissy (Sisyphus from Greek mythology) Squats!
Sissy squats are extremely effective at putting tension on the quadriceps during a deep stretch. This emphasizes the load on the muscle and caused more muscle-building microtears in the muscle. After just two days of doing this exercise, this is what my legs look like. (It has become my favorite leg exercise) This exercise targets the three largest heads of the quadriceps shown in the picture: the vastus lateralis, rectus femoris, and the vastus medialis. It also requires the activation of stabilization muscles like the glutes and hamstrings Sissy squats are named after the character in Greek mythology, Sisyphus. According to stories, he is going through a never-ending punishment of pushing a large boulder up a hill. He therefore has incredibly strong legs, hence the exercise being named after him. Tutorial ...