and snapping are different. If you’re not properly warmed up and hear a crack on the first couple of movement repetitions,
sometimes that’s gas released from the joint, an action called a cavitation, similar to when knuckles are cracked.
Resistance exercises can release gas
from the shoulder and other joints. If you’re doing reps and you hear a cracking/snapping on every rep, usually a muscle
is tight, rubbing and causing friction around the bone. In that situation, stretch first, resume the same technique, and the
snapping should decrease or be almost non-existent.
A snapping, popping, or other annoyance that starts to radiate, say from the shoulder to the
neck or through the arm, may be a pulled/torn muscle. A snap or crack in the shoulder can also mean the bones could be rubbing
on themselves, which could be a developing arthritic condition or a loose joint creating a “grating” sound.