• Weights can help you build a muscular, defined and strong back.St?¡èrke image by imagenation from Fotolia.com
  
  A muscular back is key to helping you create a muscular, well-rounded physique. It's also crucial for core strength and helps prevent injuries. The major back muscles include the latissimus dorsi, or "lats"; the teres minor and teres major; the rhomboids; and the trapezius. To build these muscles, there are a variety of weight training workout routines you can do.
  
  

Pull-up Workout

• Pull-ups are technically a body weight exercise; however, you can add weight to pull-ups once your workout has become advanced. Pull-ups are one of the best muscle-building exercises out there for building a muscular back. They work all the major muscle groups of your back. To do a pull-up workout, start by doing as many pull-ups as you can with an overhand grip in 30 seconds. Rest for one minute, then do as many pull-ups as you can with an underhand grip in 30 seconds. Rest for one minute, then do as many pullups as you can with a neutral grip, where your palms face one another. Repeat each of these exercises three times.
  
  

Row Workout

• Rows are a good mass-building exercise that target the lats and rhomboid muscles. To do a row, you'll need a barbell and a set of dumbbells. Start with the standard barbell row. Bend over at the waist and grab a loaded barbell with an overhand grip. Pull the weight up and into your chest in a slow, controlled motion. Do three sets, then move on to the single-arm dumbbell row. To do this exercise, lean over a flat bench and support your weight with your left hand. Grab the dumbbell with your right hand, and pull the weight up into your chest. Do three sets of single-arm dumbbell rows, then move on to the next exercise. To finish the row workout, do three sets of barbell rows, but use an underhand grip instead.
  
  

Cable Workout

• To do the cable workout, you'll need access to a pulley machine with a high and low pulley. Start by doing three sets of pull-downs, which target your lat muscles and help you build a muscular, V-shaped back. Do a pull-down by sitting at the pulley machine and grabbing a high pulley bar. Pull the weight down toward you until it is level with your neck area. Next, do three sets of seated rows. To do this exercise, sit so you are on the floor and your torso is at a 90-degree angle facing the low pulley machine. Grab the handle, and pull the weight toward your abs. Finish the cable workout by doing three sets of cable pull-downs. To do this exercise, stand straight up and grab a flat bar on a high pulley machine. Keep your arms locked, and pull the weight straight down until it's waist-high.