I read the other day this article about a training method with light weights (5 pounds max), a famous strongman from the old days, Eugene Sandow, had created for increasing physical power . http://fighters-journey.blogspot.gr/2012/05/inner-muscle-training-of-boxers-with.html According to the article, some famous boxers and trainers of the past like Jack Johnson and Charley Goldman were using this method for boxing training, in order to substitude heavyweight training because of the detrimental effects they thought it had, on a boxer's performance. This method and the way it trains the muscles bears, according to the author, a strong resemblance to internal martial arts training. Here are pages of Sandow's manual that show these lightweight exercices he developed http://www.sandowplus.co.uk/S/Dumbbells/Instructions/scans/di-01.htm As you will see in the link, Sandow suggested a special type of dumbbells that train the grip while executing the weighted exercises. What are your thoughts about this method?