Believe it or not, it’s one of my favorite exercises. It’s very easy and you can do it anywhere, especially in font of TV :).  If you start with lighter weights you will hardly feel it. However, it’s extremely effective in sculpting arms.!!! Also, it’s very beneficial because it strengthens my punching techniques.  I worked with 2 pounds dumbbells and execute TWO sets. First set: 50 middle punches (right & left is one), 50 upper, 50 lower. Another set of inverted punches includes: 50 inverted upper (to face), 50 side punches, 50 to the body. Then I take a short break and do it again.  Here is my demo video. It’s sort of boring…. but like I said – it’s beneficial and effective 🙂