Hello Dear Peter,

There is a patent which could help to improve bench press biomechanic. Bench press has the similar problem like shoulder press and lats pulldown.

I send you two papers that could help you finding the answer. See progressions,...

Weiss, J., & Rich, D. (2001). U.S. Patent No. 6,224,518. Washington, DC: U.S. Patent and Trademark Office.

Logan, C. (2004). Training young athletes with shoulder injuries. IDEA Personal Trainer. (Impingement Section)

Best regards

Came across your question by chance, I think you might find these useful:

Escalante, G. (2017) 'Exercise Modification Strategies to Prevent and Training Around Shoulder Pain', Strength and Conditioning Journal,39(3), pp. 74-86.

Kritz, M., Cronin, J. and Hume, P. (2010) 'Screening the upper-body push and pull patterns using body weight exercises', Strength Cond J,32(3), pp. 72-82.

->both provide info on push and pull technique and how to prevent injury with this.

Also Check out:

Starrett, K. and Cordoza, G. (2013) Becoming a Supple Leopard - The Ultimate Guide to Resolving Pain, Preventing Injury, and Optimizing Athletic Performance.Las Vegas: Victory Belt Publishing Inc.

->for a handy cue called the hand screw for closed chain exercises involving the push which involves 'screwing' the hands laterally into the ground which creates external rotation through the whole of the upper limb.

Also remember if someone is having difficulty keeping the shoulder with the elbow close to the body under load then they are ore than likely overloading and probably need to train at a more basic level possibly using closed chain exercises first (i.e push up or modified versions of this) moving onto open chain work later on. I work clinically as a physiotherapist and we see these type of faults all the time when someone comes in with an initial injury and subsequently once you target these faults through rehab exercise focussing on these points they improve.