Part of the reason I feel that I have been able to get the results I have so far is my ability to push myself. Every time I step in the gym I want to beat my previous workout by either doing more reps or more weight then last time. While this definitely is a plus it can also be a curse. I injured my AC joint the end of the 6th week of dieting when I was bench pressing. There was no warning it was just severe pain out of no where. To be honest I had never heard of the AC joint, the pain I had was isolated to the bulge of where your collar bone attaches to the top of your shoulder.
The acromioclavicular (or AC) joint is the joint created by the end of the collar bone (clavicle) connecting to the acromion of the shoulder blade (scapula).
Pain in this region of the shoulder is most commonly caused by trauma, specifically falling on either an outstretched arm or a fall landing directly on the tip of the AC joint.
When such a trauma occurs, it is called a sprain as the ligament that connects the bones becomes stretched or torn. This type of AC sprain is also called a shoulder separation.
I took a week off and have been trying to get back to working out but keep tweaking my shoulder again because of course I always need to push. So here I am now three weeks later and I feel like I am back to almost square one all over again. So for the next 2 weeks I will not be doing any presses for my chest or bicep curls. Both of these exercises are the ones that seem to agitate the injury. After two weeks I will then slowly start to train again but with low weights. Hopefully this will be enough time to heal or I will need to take more time to heal, better that then to keep pushing and end up making it worse and taking even longer to heal.