Spanning across part of the back, ribs, iliac crest and scapula, the latissimus dorsi (lats) is one of the widest muscles in the body. It plays a role in various actions and movements within the body including adduction, extension and rotation of the arm at the shoulder joint. After training, if your workout involved back exercises such as lats pull-downs, you may experience soreness in this area. This is an issue a vibrating foam roller can help with if you use it both before and after exercise for maximum results. But how do you use a foam roller effectively on your lats? In our series of foam rolling for lats guides, we’ve included this handy video for using a vibrating peanut ball which is great for targeting knots. Its unique shape allows you to angle the Pulseball into specific areas of tightness (trigger points), loosening the muscles and encouraging blood flow to the area. Watch the Pulseball in action now. Also find this post on our Google+ profile.