Weighted pull-ups are a great exercise to build mass in your upper body. Get stronger and learn the correct technique in this tutorial.
Weighted Pull Ups, What Are They? Muscles Worked? Benefits?
The Best Ways to Perform Weighted Pullups — Advanced Human Performance Official Website
The Beginner's Guide to the Assisted Pull-Up Machine
Weighted Pull Ups: How to Test Your Athletic Fitness – Garage Strength
How To Do Wide Grip Pull-Ups (Form & Benefits) - Steel Supplements
4 Ways to Strengthen Your Grip for Pull-Ups
6 Pullup Variations to Build Thick Lats and a Wider Back - Muscle & Fitness
Chin-Ups Are a Challenge—Here's How to Do Them
When should you add weight to your pull ups? - Pull Up Mate