Weighted Pull Ups

How to do it

Attach a weight to a dip belt and secure it around your waist. Grab the pull-up bar with the palms of your hands facing forward. For a medium grip, your hands should be spaced at shoulder width. Both arms should be extended in front of you holding the bar at the chosen grip.
You'll want to bring your torso back about 30 degrees while creating a curvature in your lower back and sticking your chest out. This will be your starting position.
Now, exhale and pull your torso up until your head is above your hands. Concentrate on squeezing yourshoulder blades back and down as you reach the top contracted position.
After a brief moment at the top contracted position, inhale and slowly lower your torso back to the starting position with your arms extended and your lats fully stretched.

What muscles does the Weighted Pull Ups work?: Mainly the lats, with help from the biceps, middle back.
What equipment do I need?: Other equipment.
Is it good for beginners?: It is rated intermediate level.
How do I track progress on it?: Log each set and beat the weight or reps from last time. Liftrung shows your last set beside the next one and estimates your one-rep max from your sets.

Exercise descriptions: free-exercise-db, public domain.