The reason is the anatomical difference of back muscles and triceps. So your back muscles need training with a heavy load. This also leads to the smaller size of the triceps muscle, and involved in the aforementioned exercise faster tire and injured by using a large weight. It can cause injury and lack of workout triceps and all the same improper technique exercises.
If the exercise is not so implemented properly so as to be part of the load must complied with the back muscles will be shifted to the triceps muscle. Pain in the elbow - It can occur when the athlete performs the following exercise: "Extension of the hands", "bench press." In this case it is recommended to temporarily reduce the load and reduce the amplitude. If this does not help, you should take time off from these exercises. More detailed information is available at http://health.reviewship.com/visual-impact-muscle-building-review/.
Finally, I would like to remind all athletes that do not need to rush and hurry. Always properly and correctly perform exercises calculate the forces and do not neglect in training special straps and elastic bandages. The only way you can avoid injuries and other unpleasant consequences training arm muscles.