Synergists muscles in a bench press are triceps and anterior deltoids. When performing a bench press if an athlete wants to make sure that most of the load will be distributed on his/hers pectoralis major (chest muscles) make sure to contract those muscles before the actual push...otherwise synergists will do big part of the work.
the incline bench press focuses on the upper pectorals, and the upper back and shoulder muscles.
The muscles that are used in bench dips are your front deltiods, your pectorals, your triceps and your abdominal muscles
The pec muscles,chest and tricips.
Standard bench press is not necessarily bad for baseball players, however, it is not the smartest exercise. Baseball requires long, lean muscles whereas the standard bench press builds small, tight muscles. The best form of bench press for baseball players is dumbell bench press because it requires the utilization of the stabilizer muscles in both arms and, therefore, strengthens the forearms, biceps, and triceps while maintaining long, lean muscles.
Triceps and Pectorals
You bench press because you want to build the muscles of pectoralis major or the triceps. This exercise is good for your chest and triceps.
The gastrocnemius is a synergist of the soleus.