Push-up - Right form to protect your shoulders (Part 1 )
Performing push-ups with your arms abducted at 90 degrees, as shown in picture X - a T-shape Push-up, hikes up your traps. This results in closing the space around your rotator cuff tendons, with the risk of impinging it and injuring your shoulder. Further, a T-shape push-up will put immense pressure on your neck and the anterior part of your shoulder.
A-shape push-ups on the other hand, as shown in picture ✅puts your scapula in a better and stable position which stabilises the shoulder joints.