Filed Under (Scapular Stabilization, Shoulder Injury, Shoulder Pain) by Rick Kaselj on 14-10-2010
I have been doing research this week.
A colleague, Brenda Adams, emailed me and asked if I had any reference on what muscle is being used during the bench press.
I know what muscle works, but I did not know if what I knew was right; so I hit the books.
I found the answer but also some information on grip and bench press; plus which is better – machines or free weights – when it comes to the bench press.
Enjoy!
What Muscles Are Working during Different Bench Presses?
What They Looked at
This experiment investigated the effects of varying bench inclination and hand spacing on the EMG activity of five muscles acting at the shoulder joint.
What They Did
Six male weight trainers performed bench presses under four conditions of trunk inclination and two of hand spacing at 80% of their predetermined maximum.
What They Found
- The sternocostal head of the pectoralis major was more active during the press from a horizontal bench than from a decline bench.
- The clavicular head of the pectoralis major was no more active during the incline bench press than during the horizontal one, but it was less active during the decline bench press.
- The clavicular head of the pectoralis major was more active with a narrow hand spacing.
- Anterior deltoid activity tended to increase as trunk inclination increased.
- The long head of the triceps brachii was more active during the decline and flat bench presses than the other two conditions, and was also more active with a narrow hand spacing.
- Latissimus dorsi exhibited low activity in all conditions.
Where to get more information – Barnett C. (1995). Effects of variations of the bench press exercise on the EMG activity of five shoulder muscles. 1995 Nov;9(4):10-14. (Yes, it is an oldie but a goodie. Let me know if you have something more recent.)
If the research above interested you, make sure to get my free seminar that I did on exercise and shoulder injuries, you can get it here.


In this research they assessed the effects of forward head posture in a sitting position on the activity of the scapular upward rotators during loaded isometric shoulder flexion in the sagittal plane.
























