During the last weeks, whenever I'm doing bench press or shoulder press, my right shoulder muscle kinda aches. When I lift my right arm up sideways, I hear a very subtle cracking sound. What could this be, and what do do about this?
Are there any ways to prevent stuff like this in the future, as in warm-up or stretching or whatever?
Are there any ways to prevent stuff like this in the future, as in warm-up or stretching or whatever?

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