Shoulder pain can stem from one or more of the following causes: 1  Strains from overexertion. 2  Tendonitis from overuse. 3  Shoulder joint instability. 4  Dislocation. Collar or upper arm bone fractures.  Frozen 1  shoulder. Pinched nerves (also called radiculopathy)
Joint pain can affect one or more joints. Joint pain can be caused by many types of injuries or conditions. It may be linked to arthritis, bursitis, and muscle pain. No matter what causes it, joint pain can be very bothersome. Some things that can cause joint pain are: Autoimmune diseases such as rheumatoid arthritis and lupus.
Itâs been a long-held belief in bodybuilding and gym-rat fitness circles that muscle soreness is caused when tiny tears that happen in the muscle in response to weight training. This is an example of sound-bite science. Thereâs a kernel of truth there, but some hasty assumptions and logical leaps that make it incorrect.