Illustration of a good leg workout exercise. Good and effective leg workouts for home or the gym. A good workout features exercises that target the three major leg muscles: the quadriceps, femoris (the strongest muscle of the body), the hamstring, and the calves. Each of these muscle groups should be trained equally as well for overall balance and strength. You should include at least one exercise per muscle group each session. A good workout routine also may feature a variety of equipment to hit different angles and resistances for each muscle. For example, you may use a Smith machine for do barbell squats, a set of dumbbells to do calves, and a leg curl machine for hamstrings. Making sure that you train each major muscle of the entire leg properly will help you achieve the results you desire for your lower body.