"Pull your shoulders back."
Again, this is a cue often shared with the best of intentions.
With all the sitting we do during the day, our shoulders have a tendency to pull forward.
To help reposition your shoulder joints on your lifts, it's common to be told to "pull your shoulders back."
While the intention is sound, this often causes the shoulders to not only go back, but to also go upwards towards our ears.
This is also a less than ideal position.
Really, we want our shoulders to be both back and down during our lifts.
Instead, your shoulders should be pulled down and back into a packed position where they are strong and stable.
By telling someone to imagine that they're trying to tuck their shoulder blades in their back pockets, better form is often achieved.
The Fix: "Put your shoulders in your back pocket."