Maybe it’s part of human nature, but we usually focus on what’s right in front of us. For fitness, this means we pay attention to what we see in the mirror and neglect what’s behind us. In general, all humans in modern society have weak scaps (the scaps are the area between the shoulder blades). These are the muscles you’re working when we say, “pinch your shoulder baldes together.” In CrossFit, we spend a lot of time holding things overhead, hanging from our arms or swinging heavy objects with our hips. If our shoulder blades are weak, it puts all the stress on the shoulder joint. It’s important to constantly work these muscles, and fortunately there are plenty of exercises you can do at home. Make this a regular part of your week and watch your comfort efficiency and strength go through the roof.
Here’s a good video with some simple scap exercises.